EASY PLUG Bluetooth 2.0 Module for Arduino - OpenELAB

Bluetooth 2.0 module can easily achieve serial wireless data transmission. The operating frequency is among the most popular 2.4GHz ISM frequency bands (i.e. Industrial, scientific, and medical).

It adopts Bluetooth 2.1+EDR standard. In Bluetooth 2.1, signal transmit time of different devices stands at a 0.5 seconds interval, so that the workload of Bluetooth chip can be reduced substantially and more sleeping time can be saved for Bluetooth.
It has build-in on-board antenna which provides high quality signals. 
This module should be used together with EASY plug control board.