This Bluetooth Bee module is a Bluetooth 4.0 wireless module based on CC2541 chip. It has a compact size and the pinout is compatible with XBEE which is suitable for all kinds of microcontroller systems which have 3.3V power output. The module can use AT commands to set the baud rate. The Bluetooth Bee module comes with an onboard antenna which provides a better signal quality. It acts like a transparent serial port. It can work with iPhone and Android devices that support Bluetooth 4.0. Its baud rate can be modified to use with XBEE adapter. Specifications Bluetooth chip: CC2541 Bluetooth protocol: Bluetooth 4.0 SMART Operating frequency: 2.4 ~ 2.48GHz unlicensed ISM band Speed: Asynchronous: 6K Bytes, Synchronous: 6K Bytes Modulation: GFSK (Gaussian Frequency Shift Keying) Transmit Power: 23dbm, -6dbm, 0dbm, 6dbm, can modify through AT command Transmission distance: 50 ~ 60m in free space Ultra-low standby power consumption 400uA ~ 800uA Support profiles: Bluetooth serial port Serial port settings: 1200 ~ 230400 / N / 8 / 1 Baud rate default: 9600 Input Voltage: +3.3 DC/50mA Operating temperature: -20 ℃ ~ +55 ℃ Module Size: 32 × 24 × 9mm Document: AT Command iPhone test APP Bluetooth Setting Tool