RioRand Bluetooth 4.0 BLE Low Energy/Power RF Master-Slave SOC Smart Hardware Serial Transceiver Module 2.4GHz Bridge/Direct-driven Mode - CC2540 iBeacon - 15.111.22.5mm - For Apple/Android Powered by RioRand Advanced Technology the Bluetooth Module is a high-performance and Low-power Bluetooth 4.0 RF SOC module that incorporates the Texas Instruments CC2540 transceiver chip in the industry's smallest package 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.