Power:bit watch Lite kit for micro:bit （without micro:bit Board）
Power:bit button cell board is a micro expansion board in the smallest size equipped with a buzzer. It can not only supply power to the board but is also equipped with P1, P2,GND and 3V ports by the row needles, which can be used with our acrylic watch straps and boards.
Fix your micro:bit and power:bit together with screws. Insert two Li-batteries into the battery socket.
Fix the back crystal board with 3 hexagon screws.
Make the longer watch band through the holes on the crystal board. See picture below
1 x powerbit
1 x Acrylic Case
1 x Nylon Watch Band