Make fun, powerful and autonomous robot projects with your BBC micro:bit and the robot:bit Robotics Expansion Board from PMD Way. This incredibly useful board adds a ton of fun and useful functionality to your micro:bit, including: four RGB LEDs LEGO-compatible hole spacing! interface to control eight servos (with external power - or two servos using onboard battery) interface to control two DC motors or one stepper motor buzzer for noise and alerts onboard holder for 18650 rechargeable battery onboard battery power and charge management You can build a motorised robot or crawler or any other device with motors, servos, flashing lights and plenty of noise! Please note - package does not include BBC micro:bit or 18650 battery. Specifications: Size: 7.8 x 5.7 x 5.3cm Net weight: 32.8g Thickness of PCB board: 1.6mm Diameter of small hole: 3.0mm Diameter of big hole: 4.8mm Battery voltage: 3.7V USB input voltage: 5V