Features of 1 Channel 5 Volts Arduino Relay Module: With isolation groove in the control area and load area. With power and relay action indication, bright when connect and go off when disconnects. When there is a signal in signal input, public side and the common side will break over. It can be not only used as a microcontroller development board module but also as a home appliance control. It can not only control the DC or AC signal but the 220V AC load. With a permanent open and close vents contact. It is convenient to connect with blue KF301 terminal access control cable. Specification of Single One Channel 5V Best Arduino Relay Module: VCC: Power interface,5V GND: Ground IN: Control interface. Drive Current: At least 4mA COM: Control circuit ground, connect to GND Size: approx. 41 x 16 x 16mm/ 1.61 x 0.62 x 0.62'' Weight: Approx. 12g Package Includes: 1 x 1 Channel 5V Arduino Relay Module Best Online Shopping website for 1 Channel 5V Arduino Relay Module Single One Channel 5 Volts Relay Module For Arduino in cheap price in Karachi, Lahore, Islamabad, Rawalpindi, Sukkur, Peshawar, Multan, Quetta, Faisalabad and all over Pakistan.