Micro-Bit Expansion Board IOBIT V2.0 Adapter Shield with Buzzer for 3713 If P0 is used as a normal IO port, the buzzer toggle switch must be placed on the off side, otherwise the buzzer sound or the IO read value be abnormal. Builtin buzzer (switch switching). 5V 1A selfrecovery fuse. byJuly 5, 2026
