Brand Meeeno Model MN-MD-R0412 Quantity 1 Color Orange + blue Material FR4 Features 4-channel 12V relay module expansion board; Allows to control various appliances and other equipment with large current; With power supply anti-reversed connection protection more safe and convenient to use; Great for DIY projects Specification Relay voltage: 12V; Drive current: 20mA; Relay drive electrical level: 12V TTL level; High level drive trigger current is about 5mA; Contract capacitance (controlled by signal power): AC 240V/7A; 125V/10A; 120V/12A; DC 28V/10A; Contract: one is normally open contact and the other is normally-closed contact; Indicator light: Power indicator light 4 signal indicator light; (Contract signal indicator is on); PCB location hole: 3mm standard location hole can install 3mm standard copper cylinder or screw Application Arduino teaching DIY project development; Openkaku SNS singlechip study and experiment English Manual/Spec Yes (electronic format) Packing List 1 x Relay muodule expansion board