The Grove2Grove Expansion Unit from M5Stack is a Grove expansion Unit with On/Off Control + Current Meter functions. On/Off control adopts switch value, Current meter is 0 – 3.3V analog signal. Features On/Off control: 5V/1A Current meter: 0~1000mA Package Contents 1x Grove2Grove Expansion Unit 1x HY2.0 4-pin cable (20cm) Specifications Net Weight 5.0g Gross Weight 10.5g Voltage 5V Switch Current 1000mA Circuit Voltage 5V Current Meter Range 0~1000mA Product Size 32.04*24.01*8.05 mm Package Size 90*135mm Resources Product Documentation and example code Schematic