This kit contains the micro:bit board as well as a Micro USB cable and battery cage with batteries to help get you started. Pack contains: Microprocessor: 32-bit ARM Cortex M0 CPU, 5_5 LED matrix with 25 red LEDs, Two programmable buttons, On-board motion detector and 3-axis digital accelerometer, Built-in compass and 3D magnetometer, Bluetooth Smart technology capability, Five ring I/O, programmable as analogue or digital, 20 Pin edge connector for standard connectors, Interfaces to a computer as a memory stick.