Description: Function: The relay uses weak current to control strong current (low voltage to control high voltage; level signal to control mechanical signal). Use: This module is a high level trigger. After the module is powered on the control port receives a high level and the relay will be connected. ABS: The relay is made of ABS durable and wear-resistant andThe relay is easy to install and operate. Low Energy Consumption: the relay uses 5V 3.3V 12V voltage with low energy consumption. After-sales Service: If there is any problem with our products please contact us first we will provide you with good solution in the fastest time. So why not give it a try Specification: Material: ABS. Color: Blue. Size:Approx.6.3x4.2x2 cm/2.48x1.65x0.78 inches. includes: 1 Piece Relay