Overview 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. Feature Use the CSR Bluetooth chip, compatible with the Bluetooth V2.0 protocol Operating Voltage 3.3V Adjustable baud rate : 1200,2400,4800,9600,19200,38400,57600,115200 Size: 28mm x 15 mm x 2.35mm Operating Current 40 mA Sleep Current < 1mA Documents Please visit our wiki page for more info about this product. It will be appreciated if you can help us improve the documents by correcting the errors, adding more demo codes or tutorials.