RS232/RS485/RS422 universal Bluetooth serial port adapter. Convert RS232/RS485/RS422 interface into Bluetooth wireless transmission transparently without changing the original serial port communication software. 2.4GHz radio frequency hopping design; Serial port support 1.2Kbps-460.8Kbps Baud rate; Bluetooth wireless communication distance: 300m (open area); 9-40VDC wide voltage power supply; Industrial grade design; Strong anti-interference ability.