RioRand Bluetooth 4.0 BLE Low Energy/Power RF SOC Transceiver Smart Hardware Serial Module 2.4GHz Bridge/Direct-driven Mode - CC2540 iBeacon - 2414mm - For Apple/Android Powered by RioRand Advanced Technology Can be externally controlled via simple ASCII AT commands over the UART or 7,programmed with custom applications embedded in the module. Over 70 meter (230 ft) line of site (LOS) distance with integrated antenna. RSSI monitoring for proximity applications Supports master and slave modes; ,Integrated Bluetooth low energy stack including ATT,GATT, SMP, L2CAP, GAP Bluetooth 4.0 single mode Compliant ISM 2.4GHz module.Utilizes the TI CC2540 SoC with 256K Flash, 8K RAM.