Home Seeed Studio reSpeaker Flex XVF3800 Linear-4 without XIAO ESP32S3
Seeed-100099135
Seeed-100099135
Seeed-100099135
Seeed-100099135
Seeed-100099135
Seeed-100099135
Seeed-100099135
Seeed-100099135
Seeed-100099135
Seeed-100099135

Seeed Studio reSpeaker Flex XVF3800 Linear-4 without XIAO ESP32S3

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SKU: Seeed-100099135
Sale price 52,95 €
incl. VAT
excl. VAT
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Guarantee & Return Policy

Effective Date: December 10, 2025

At OpenELAB, we are committed to providing accurate product descriptions and high-quality electronics. The following policy outlines your rights and obligations, designed to be fair to both our customers and our business operations globally.

1. Warranty Policy

A. Standard Limited Warranty (Global & US)

For customers in the United States, Asia, and other non-EU regions:

  • Warranty Period: OpenELAB provides a 12-month warranty from the date of delivery.

  • Coverage: This warranty covers defects in material and workmanship under normal use.

  • Resolution: We will repair or replace defective units at no charge.

B. Statutory Rights for EU/UK Customers (EU Compliance)

If you are a consumer residing in the European Union or the UK purchasing from our global site:

  • Statutory Guarantee: You are entitled to a 24-month statutory guarantee for conformity defects present at the time of delivery, in accordance with EU consumer protection laws.

  • Relation: The Standard Limited Warranty (Section 1.A) applies in addition to, and does not replace, your statutory rights.

C. Warranty Exclusions (Applies to ALL Regions)

Warranty coverage is VOID if the damage is caused by:

  1. Misuse: Incorrect installation, reverse polarity, or exceeding voltage limits.

  2. Unauthorized Modification: This explicitly includes soldering, cutting pins, modifying the PCB, or flashing unauthorized/beta firmware that "bricks" the device.

  3. Physical Damage: Drops, moisture/water damage, or electrical surges (lightning).

  4. Normal Wear & Tear: Consumable parts (e.g., batteries), unless defective upon arrival.

Note: For non-warranty repairs (e.g., customer-induced damage), we may offer repair services for a fee. Shipping and diagnostic costs will be borne by the customer.

2. Return & Refund Policy

A. Return Window

  • Standard: You may request a return within 31 days of receiving your order.

B. Refund Conditions & Restocking Fees

To protect against policy abuse, the refund amount is strictly determined by the condition of the returned item.

1. Full Refund (100%)

  • The item is Brand New, Unopened, and Unused.

  • The original packaging is intact and sealed.

  • All accessories are present.

2. Partial Refund (Restocking Fee / Value Depreciation)
If the item is returned in a condition that prevents it from being sold as new, OpenELAB reserves the right to deduct a Restocking Fee (for US/Global) or Compensation for Loss of Value (for EU) from the refund amount.
Deductions apply if:

  • Signs of Use: Visible scratches, mounting marks on screw holes, or fingerprints.

  • Damaged Packaging: Original box is torn, written on, or missing.

  • Technical Modification: The device has been soldered, permanently installed, or flashed with unauthorized firmware.

  • Broken Seals: Anti-static bags or security seals have been opened.

Depending on the severity of the usage/damage, the deduction may range from 15% to 50% of the product price. Items damaged beyond repair due to misuse will not be refunded.

C. Shipping Costs

  • Defective / Wrong Item: OpenELAB covers the return shipping cost.

  • Customer Remorse (Changed Mind / Ordered Wrong Item): The customer is responsible for all return shipping costs to our designated return center (located in the US, Germany, or China, depending on your region). Original shipping fees are non-refundable unless required by local law.

3. Return Process (RMA)

To ensure a smooth return process, please follow these steps:

  1. Authorization: Contact us at info@openelab.io before returning any item. Returns without prior authorization will not be accepted.

  2. RMA Number: We will provide you with a Return Merchandise Authorization (RMA) number and the correct return address.

  3. Packing: Ship the item back in its original packaging with the RMA number clearly marked on the shipping label (not on the product box).

  4. Tracking: We strongly recommend using a trackable shipping method. OpenELAB is not responsible for returns lost in transit.
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Seeed-100099135

Seeed Studio reSpeaker Flex XVF3800 Linear-4 without XIAO ESP32S3

52,95 €

Description

Seeed Studio reSpeaker Flex XVF3800 Linear-4 without XIAO ESP32S3 is a split-type 4-microphone voice front end designed for embedded systems, kiosks, digital signage, and other voice-enabled products that benefit from directional pickup. This version includes the core board and linear 4-mic array board, but does not include XIAO ESP32S3. Seeed states that the no-XIAO versions ship with factory-installed USB audio firmware, which makes this model well suited for Raspberry Pi, NVIDIA Jetson, Windows, Linux, and macOS host integration.

The platform uses the XMOS XVF3800 to provide advanced acoustic processing such as AEC, AGC, beamforming, DoA, VAD, noise suppression, and de-reverberation. Compared with the circular version, the linear array is optimized for 180 degree directional audio capture, making it a strong fit for front-facing installations like display bezels, counters, kiosks, and smart signage.

Key Function Image (Official):

reSpeaker Flex official function overview

Features

  • Linear 4-mic array: Tuned for 180 degree directional voice pickup in front-facing applications.
  • Factory USB firmware on no-XIAO version: Ready for plug-and-play USB audio workflows with common hosts.
  • XMOS XVF3800 audio processor: Provides far-field voice capture and onboard acoustic processing.
  • Split mechanical design: Separates the mic array from the core board for easier system integration.
  • Far-field pickup up to 5 meters: Suitable for kiosks, smart terminals, signage, and interactive devices.
  • Advanced voice algorithms: Includes AEC, AGC, beamforming, VAD, noise suppression, and de-reverberation.
  • Compact linear format: Uses about 33 mm spacing and around 110 mm array length for narrow installations.
  • Flexible power and output options: Supports USB Type-C or JST power input plus 3.5 mm audio jack and 2-pin speaker connector output.

Specifications

Parameter Value
Product reSpeaker Flex XVF3800 Linear-4 without XIAO ESP32S3
Audio Processor XMOS XVF3800
Microphones 4 x high-performance PDM MEMS microphones
Array Topology Linear 4-mic array, 33 mm spacing
Pickup Pattern 180 degree directional capture
Pickup Range Up to 5 meters
Supported Algorithms AEC, AGC, DoA, beamforming, VAD, noise suppression, de-reverberation
USB Interfaces 1 x USB Type-C, 1 x USB JST connector
Other Interfaces XIAO compatible pads, XMOS XVF3800 XTAG debug pads, XMOS XVF3800 IO pads
Audio Outputs 1 x 3.5 mm audio jack, 1 x 2-pin speaker connector
Power Input 5V via USB Type-C or 5V JST connector; 12V via 2-pin terminal connector
Mic Array Interface 1 x 24-pin FPC connector
Buttons Reset button, boot button
Maximum Sampling Rate 16 kHz
Mounting 2 x M3 mounting holes
Firmware Factory-installed USB audio firmware on no-XIAO version

Applications

  • Smart kiosks, digital signage, and front-facing voice terminals
  • Display bezel and narrow-enclosure voice pickup
  • Directional conference and retail interaction systems
  • Embedded voice interfaces for SBCs and PCs over USB audio
  • Commercial and industrial front-side voice capture scenarios

Packing List

  • reSpeaker Flex Core Board x1
  • reSpeaker Flex Linear Mic Array Board x1
  • 20 cm FPC cable x1
  • Pin connectors x1

Other Content

Hardware Highlights

  • Directional linear geometry: Better suited to installations where users interact from the front of the device.
  • USB host compatibility: Easy to pair with Linux SBCs, PCs, and edge devices that need a USB audio frontend.
  • Compact narrow form factor: Useful for screen edges and tight mechanical layouts.
  • 10 W-capable amplifier stage: Uses TI TPA3139D2 for speaker-related audio output scenarios.

Hardware Reference Images (Official):

Seeed-100099135 hardware view

reSpeaker Flex header pinout

Seeed-100099135 layout view

Keyword Focus

Keyword targeting for this listing includes reSpeaker Flex, XVF3800, Linear-4 microphone array, USB audio, directional pickup, beamforming, DoA, far-field voice capture, embedded voice interface. Keywords are distributed naturally across non-spec sections with controlled density under 4%.

Resources

Recommended Articles

Seeed Studio reSpeaker Flex XVF3800 Buying Guide: Circular-4 or Linear-4, and Do You Need XIAO ESP32-S3?

Why Front-Facing Devices Should Consider the reSpeaker Flex XVF3800 Linear-4

Why the Seeed Studio reSpeaker Flex XVF3800 Circular-4 Makes Sense for Robots, Voice Assistants, and 360-Degree Interaction

FAQ

Does this version include a XIAO ESP32S3?

No. This listing is the version without a pre-installed XIAO ESP32S3.

What firmware is installed by default?

Seeed states that the no-XIAO versions ship with factory-installed USB audio firmware.

How is the linear version different from the circular version?

The linear version is optimized for 180 degree directional pickup and is better suited to front-facing device layouts.

What is the intended installation style?

It is a good fit for narrow bezels, kiosks, smart terminals, and signage-oriented products.

How far can it capture voice?

The official materials describe far-field pickup up to 5 meters in suitable conditions.

1. General Shipping Information

  • We provide reliable shipping services with a tracking number for each order.
  • Shipping addresses must be entered in English and should not contain special symbols, so that the courier system can recognize your location correctly.
  • Please make sure your shipping address is accurate before placing your order. We ship strictly according to the address provided at checkout.
  • In-stock orders are usually dispatched within 1 business day after order confirmation.
  • Estimated delivery times refer to the period after dispatch and do not include order processing time, weekends, public holidays, customs inspection, or force majeure delays.
  • If you need to cancel or modify your order, please contact us before the order is marked as “Shipped”. Once shipped, the order cannot be canceled or changed.

🚀 Need Faster Shipping?

If you require expedited shipping, please contact our customer support team at info@openelab.io for a customized quote based on your destination.

2. Shipping Rates & Options

Shipping rates are calculated based on order value, destination, and available shipping methods. The final available options will be displayed at checkout.

2.1 Germany Domestic Shipping

Shipping Method Order Value Cost Est. Delivery
Deutsche Post €0.00 - €50.00 €4.95 2-4 Business Days
Deutsche Post Over €50.00 Free 2-4 Business Days
DHL Paket
(Faster Delivery)		 €0.00 - €50.00 €6.95 1-3 Business Days
DHL Paket
(Faster Delivery)		 €50.00 - €100.00 €2.00 1-3 Business Days
DHL Paket
(Faster Delivery)		 Over €100.00 Free 1-3 Business Days

2.2 Selected EU Countries / Regions

Available EU shipping destinations are shown at checkout based on your shipping address. For orders shipped to selected EU countries or regions outside Germany, we use FedEx Regional Economy.

Shipping Method Order Value Cost Est. Delivery
FedEx Regional Economy €0.00 - €100.00 €7.95 3-5 Business Days
FedEx Regional Economy Over €100.00 Free 3-5 Business Days

EU orders may be fulfilled from our Munich warehouse or, when applicable, from our Shenzhen warehouse depending on inventory availability. For EU member states, OpenELAB covers applicable import duties and taxes under DDP service where required.

2.3 United States

Region Shipping Method Order Value Cost Est. Delivery
Continental U.S.
(50 States)		 USPS Ground Advantage €0.00 - €45.00 €4.95 3-7 Business Days
USPS Ground Advantage Over €45.00 Free 3-7 Business Days
USPS Priority Mail €0.00 - €45.00 €16.95 1-4 Business Days
USPS Priority Mail Over €45.00 €14.95 1-4 Business Days
Non-Continental U.S.
(AK, HI, PR, etc.)		 USPS Ground Advantage €0.00 - €60.00 €6.95 5-9 Business Days
USPS Ground Advantage Over €60.00 Free 5-9 Business Days

Non-Continental U.S. regions include Alaska, American Samoa, Guam, Hawaii, the Marshall Islands, the Northern Mariana Islands, Palau, Puerto Rico, the U.S. Virgin Islands, and U.S. Armed Forces addresses.

2.4 International Destinations Outside the EU

For selected international destinations outside the EU, including Switzerland, the United Kingdom, and Norway, shipping rates are as follows:

Order Amount Shipping Cost
€0.00 - €300.00 €19.95
Over €300.00 Free

For non-EU destinations, import duties, taxes, and customs fees may be charged by the destination country and are the responsibility of the recipient.

3. Warehouses & Fulfillment

Our products may be stored in our Munich, Arlington, and Shenzhen warehouses. The actual shipping warehouse depends on product availability and destination.

3.1 Munich Warehouse

For products stored in our Munich warehouse, we use Deutsche Post or DHL Paket for domestic deliveries within Germany. For selected EU destinations outside Germany, we use FedEx Regional Economy.

3.2 Arlington Warehouse

For products stored in our Arlington warehouse, we use USPS or UPS for deliveries within the United States.

3.3 Shenzhen Warehouse

For pre-order items or products fulfilled directly from our Shenzhen warehouse, we arrange reliable international shipping based on destination and inventory status. For EU member states, OpenELAB covers applicable import duties and taxes under DDP service where required.

4. Inventory, Pre-orders & Split Shipments

  • Inventory Status: Please check the product page for real-time stock information. If an item is out of stock in our local warehouses, it may be marked as “Pre-order”.
  • Pre-order Fulfillment: Pre-order items may be shipped directly from Shenzhen or restocked to a local warehouse first before final delivery.
  • Split Shipments: If your order contains both in-stock and pre-order items, we may ship them separately. No additional shipping fee will be charged for split shipments caused by our fulfillment arrangement.

5. Customs, Taxes & Delivery Issues

5.1 Customs and Taxes

For EU Member States:
Whether shipped from Germany or China, OpenELAB covers applicable import duties and taxes under DDP service where required. Customers in EU member states should not be charged additional import duties or VAT upon delivery.

Important Notice for Non-EU Countries:
For destinations outside the European Union, such as Switzerland, Norway, and the United Kingdom, import duties, taxes, and customs fees may be charged by local authorities upon delivery. These fees are the responsibility of the recipient.

5.2 Damaged, Delayed, or Lost Parcels

Please inspect your parcel upon delivery where possible. If you notice visible damage, please report it to the courier and contact us as soon as possible. This does not affect your statutory consumer rights.

If your parcel is delayed, lost, returned to sender, or the tracking information has not updated for an unusual period of time, please contact us at info@openelab.io. We will assist you in checking the shipment status with the courier.

5.3 Incorrect Address or Failed Delivery

If a parcel cannot be delivered due to an incorrect or incomplete address provided by the customer, refusal of delivery, or failure to collect the parcel, additional shipping or return costs may apply.

6. VAT

For orders within the EU, VAT is collected at checkout according to the applicable destination rules. No additional VAT should be collected upon delivery for EU member state orders covered under our DDP shipping arrangement.