ITEM NAME:5Pcs 1-Channel 5V Relay Module Shield for Arduino 1280 2560 ARM PIC AVR DSP Product Description Description: Features: 1. With isolation groove in control area and load area. 2. With power and relay action indication, bright when connect and go off when disconnects. 3. When there is a signal in signal input, public side and common side will breakover. 4. It can be not only used as a microcontroller development board module, but also as a home appliance control. 5. It can not only control the DC or AC signal, but the 220V AC load. 6. With a permanent open and close vents contact. 7. It is convenient to connect with blue KF301 terminal access control cable. Specification: 1. VCC: Power interface ,5V 2. GND: Ground 3. IN: Control interface .Drive Current at least 4mA 4. COM: Control circuit ground ,Connect to GND 5. Single Size: approx. 41 x 16 x 16mm/ 1.61 x 0.62 x 0.62'' 6. Weight: approx. 58g Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding. Included: 5 x One Channel 5V Relay Module Shield.Included: 5 x One Channel 5V Relay Module Shield. With power and relay action indication, bright when connect and go off when disconnects. Drive Current at least 4mA. VCC: Power interface ,5V. When there is a signal in signal input, public side and common side will breakover.