Industrial serial port bluetooth, Drop-in replacement for wired serial connections, transparent usage. You can use it simply for a serial port replacement to establish connection between MCU and GPS, PC to your embedded project and etc. Computer and peripheral devices GPS receiver Industrial control MCU projects Default serail port setting : 9600, N, 8, 1 Pairing code : 1234 Running in slave role: Pair with BT dongle and master module Usage Coupled Mode: Two modules will establish communication automatically when powered. PC hosted mode: Pair the module with bluetooth dongle directly as virtual serial. Bluetooth protocal : Bluetooth Specification v2.0+EDR Frequency : 2.4GHz ISM band Modulation : GFSK(GaussianFrequency Shift Keying) Emission power : <=4dBm, Class 2 Sensitivity : <=-84dBm at 0.1% BER Speed : Asynchronous: 2.1Mbps(Max) / 160 kbps, Synchronous: 1Mbps/1Mbps Security : Authentication and encryption Profiles : Bluetooth serial port CSR chip : Bluetooth v2.0 Wave band : 2.4GHz-2.8GHz, ISM Band Protocol : Bluetooth V2.0 Power Class : (+6dbm) Reception sensitivity: -85dBm Voltage : 3.3 (2.7V-4.2V) Current : Paring - 35mA, Connected - 8mA Temperature : -40~ +105 Degrees Celsius User defined Baud rate : 4800, 9600, 19200, 38400, 57600, 115200, 230400,460800,921600 ,1382400. Dimension : 26.9mm*13mm*2.2mm Package List: 1 * DB9 RS232 Wireless Bluetooth Serial Module Slave 4 Pin