Two Way IO Protection GPIO Expansion Board w/ Selectable Voltage - Red
The module uses imported chips connects out of 8 bidirectional IO expansion port through I2C bus Raspberry Pi; Address can be changed by operating A0 A1 A2 via a jumper; Up to eight different addresses can be selected which are 0x20~0x27; Expansion board has led Raspberry PI IO port out again can cascade up to eight expansion boards; With isolation protection can effectively prevent Raspberry Pi from damage due to improper operation .