IO : bit is a functionable expansion mini board for Micro: bit, which contains a miniature buzze.
It is different from the general expansion board on the market, not just IO adapter board.
1. Plug and play, compatiable with Micro:bit
2. With Lego mounting holes, compatiable with KittenBot
3. With miniature buzzer
Size: 3.7 x 5.7 cm
Net weight: 15g
Thickness of PCB board: 1.6mm