SparkFun DEV-17852 Kitronik MI:power Board V2 is designed to provide portability for wearable projects. This lightweight board easily fits against BBC micro:bit and features a built-in buzzer and 3V coin cell holder. The MI:power board is connected directly to the 3V, GND, and P0 connections on the micro:bit during assembly. This board offers easy access to the ON/OFF switch that makes it easy to turn a project on and off. The MI:power board also comes with countersunk M3 machine screws, M3 hex full-width nuts, plastic spacers, and a CR2032 3V coin cell.