It is embedded within the Bluetooth communication protocol no need to install the driver can be used in Windows systems you can also use DOS Linux and other non-graphical operating system; CSR Bluetooth chip Bluetooth 2.1 standard. Enhanced BER error rate performance and automatic frequency hopping technology can ensure efficient and secure communication and has a stronger anti-jamming capability to ensure the stability and reliability of the communication; User can set total 12 different baud rates (default is 9600n81) from 1200bps to 1382400bps by using the AT command; Can also set more personalized Bluetooth name for the device; Support the Bluetooth Serial Port Profiles (SPP) and can communicate and connect with devices equipped with a Bluetooth such as desktop computers handheld Bluetooth PDA and Bluetooth GPS device supports Bluetooth SPP service; Transmitting power complies with the Bluetooth Class2 standard built-in high sensitive PCB printed antenna stable communication distance of up to 15m; Equipped with a RESET button that can remove the saved paired device information and re-paired with the new Bluetooth device; Need power supply through mini USB port; Executive Standard: Bluetooth SIG v2.1 + EDR; Bluetooth protocol: the Bluetooth serial port profile (the SPP); Interface Interface: RS232; Communication speed: 1200 2400 4800 9600 19200 38400 57600 115200 230400 460800 921600 1382400bps; Modulation : 2.4G ISM direct sequence frequency hopping (FHSS); Communication distance: open space of 15 meters Class 2 level; Transmit power: 4dBm; Receiving sensitivity: -79dBm; Operating voltage: 5V; Sleep current Operating current: 40mA/1.6mA (typical value); Operating temperature / storage temperature : -10~50'C / -20~80'C