1. -NANO is a product based on Bluetooth 4.0 protocol combined with for . functions and pins are compatible with for motherboards. 2. The working frequency band is in the 2.4GHz range, which supports users to and the device name, service UUID, transmission power, pairing password and other commands through AT commands, which is convenient and flexible to use. 3. The product is small in size, suitable for working environment with limited volume 4. Powerful Bluetooth connection, and may need to use all sensors to design innovative applications 5. The current wearable mobile phone peripheral devices can be developed with the -NANO platform, and -NANO can be used to connect with Bluetooth 40 devices to achieve wireless transmission between two Bluetooth devices, and master-slave . Product parameters: chip: CC2540F256 Support AT to configure Support USB virtual serial port, hardware serial port, three-way transparent transmission Support master-slave switch Support Bluetooth automatic slave in mode Interface: Mirco-USB Input voltage: USB 5V power supply or external DC 6-12N power supply Pin spacing: 2.54mm Measured effective distance connection: 10 Colour: black : PCB+metal Size: 20 x 11 x 6.5MM Package Contents: 1 x -Nano motherboard Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.