RS232 Bluetooth Serial Adapter Communication Master-Slave 2 Modes 5v mini usb Interface: RS232 Executive standard bluetooth SIG v2.1+EDR Bluetooth protocol: bluetooth serial port profile (SPP) Communication speed: 1200,2400,4800,9600,19200,38400,57600,115200,230400,460800,921600,1382400 bps Modulation type: 2.4G ISM direct sequence frequency hopping (FHSS)