DFROBOT Bluno Beetle - A Compact Size Arduino With BLE Open Source Hardware Maker DIY Maker/It Is Fully Compatible With Bluno In Instructions And Procedures. Support Bluetooth HID And Ibeacon Modes&iexcl;&shy; ATmega328@16MHz Bluetooth Low Energy (BT 4.0) Micro USB port Super Compact Size Support Bluetooth HID and ibeacon Comaptible with all DFRobot Bluno Series Support Wireless Programming