1: For Pico Bluetooth dual-mode expansion board is an expansion board with Bluetooth 5.1 dual-mode function, universal serial port AT control, support SPP and .2: It can be used with Pico for to realize Bluetooth wireless communication application.3: Onboard for Pico interface, suitable for Pico series motherboards.4: It is suitable for Pico series motherboards, soldering female headers, can be directly connected to the Pico motherboard, and supports stacking .5: UART interface communication, general serial port AT control, can get started quickly.Product Name: Pico Bluetooth Expansion BoardBluetooth module: dual-mode Bluetooth to serial port moduleTransmission distance: 30 meters (open area) interface UART interfaceAntenna: Onboard PCB AntennaTransmission buffer: The UART buffer of the module is 1K bytes, and it is recommended the transmission of SPP should not exceed 512 bytes at a timeSerial port baud rate: 13 baud rates can be set, the default is 115200bpsInput voltage: 5V/3.3VWorking current: Instantaneous current at startup: about 25mA, lasting about 300ms; steady state current: about 6mA, not in low- mode; see the manual for low- mode current Number: Pico expansion boardType: Bluetooth Module With:for Type:wireless communication modulDemo Board Type: Armcolor:BlueMaterial:PCBsize:56.5 x 21mmPackage Contents:1 x Expansion BoardOnly the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.