Features? A relay module to control high voltages with a low voltage by connecting to an MCU. ? Support control of DC and AC signals (AC 220V load) ? Working voltage: 5V; PCB size: 2.0 x 4.3 cm? With power light and signal output indicator ? A 3-pin anti-reverse cable includedTechnical DetailsIntroductionWhen a low level is given to SIG、 the PNP transistor is energized; then the coil of the relay thus is energized and the normally open contact is closed、 with LED lighting up. If a high level is given to SIG、 the PNP de-energized; thus、 the relay returns to the original state and the LED goes out. Application The module can be used as a development module on an MCU or for control of household appliances. Component List - 1 x Relay Module- 1 x 3-Pin anti-reverse cable