Seeed Studio RF Explorer ISM Combo PLUS - Slim
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Estimated dispatch: 10–20 days after ordering.
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Seeed Studio RF Explorer ISM Combo PLUS - Slim
Compact Spectrum Analyzer for Sub-1GHz and 2.4GHz Bands Equipped with an internal LNA amplifier and selectable attenuator, this device ensures reliable performance across the sub-1GHz band.
Wide Frequency Coverage Supports low frequencies from 50 kHz, covering LF, MF, HF, VHF, and UHF up to 960 MHz, plus dedicated high-frequency support for the 2.4 GHz band (2.35–2.55 GHz).
Enhanced Usability New HELP and SET buttons simplify configuration with intuitive two-click preset selection.
Optimized for HAM Operators Ideal for amateur radio bands from 160 meters to 33 cm.
Portable & Durable Pocket-sized, lightweight, and built with a solid metal case for long-lasting use.
Advanced Spectrum Analysis Includes Peak Max & Hold, Normal, Overwrite, and Averaging modes.
Extended Battery Life High-capacity lithium battery provides over 20 hours of continuous operation, rechargeable via USB.
Cross-Platform Compatibility Works seamlessly with Windows, Linux, and macOS using open-source software and API libraries.
Description
Note
RF Explorer is a very sensitive spectrum analyzer, specially designed to detect signals with aerial antenna. For extra protection when connecting the analyzer to a signal source with a coaxial cable, we suggest
using a RF Explorer Power Limiter. More details at www.rf-explorer.com/PLIMITER
RF Explorer ISM COMBO+ is a powerful, high performance digital spectrum analyzer covering the 1GHz frequency range starting at 50KHz, and 2.35GHZ to 2.55GHz for scanning the popular 2.4GHz band.
The new SLIM design offers an outstanding robust enclosure, a more convenient USB connector on the side and larger internal battery capacity.
Compared to the baseline ISM COMBO model, the new PLUS includes a higher frequency range in the sub-1GHz band, more sensitivity and higher RF Generator power output in the 2.4GHz band.

Specification
- Frequency band:
- Left connector: 0.05 – 960MHz
- Right connector: 2350 – 2550MHz
- Frequency span:
- Left connector: 0.1 – 960MHz
- Right connector: 2 – 85MHz
- Internal selectable LNA 25dB gain with the left connector
- Internal selectable Attenuator 30dB with the left connector
- Signal generator covering up to +11dBm output power with the right connector.
- Wifi Analyzer for the 2.4GHz band
- Graphics LCD 128x64 pixels, great visibility outdoors
- Support included for Windows, Linux and MacOS X
- Backlight for great visibility indoor
- Internal Lithium Ion 1800mA/h rechargeable battery
- Standard SMA 50 ohms connector
- Wideband 144/433MHz dual band telescopic antenna included
- UHF 400-900MHz rubber duck articulated antenna included
- 2.4GHz whip antenna included
- Amplitude resolution: 0.5dBm
- Dynamic range: -125dBm to 10dBm
- Absolute Max input power: +30dBm
- Average noise level (typical LNA): -125dBm
- Frequency stability and accuracy (typical): +-10ppm
- Amplitude stability and accuracy (typical): +-2dBm
- Frequency resolution: 1Khz
- Resolution bandwidth (RBW): automatic 2.6Khz to 600Khz
Part List
1 x Spectrum Analyzer
1 x Mini USB cable
1 x Dual band 144/430MHz Telescopic antenna
1 x UHF 400-900Mhz antenna
1 x 2.4GHz whip antenna
1 x EVA case
Documents
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.
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.



