Features:Onboard square USB interface, stable connection.Use imported high performance USB control chip.Use the special relay drive chip ULN2803, the relay works more stable.Military-grade PCB board production.Board power socket and terminal, two ways to access the power supply are convenient and flexible. When the power is connected, the relay can remain set even if the computer is turned off or the USB is unplugged from the computer.Specification:Input voltage: DC 12 VInput current: greater than 300mAWiring method: NC/COM/NOCan control AC 250V, 10A AC load and DC30V 10A DC loadRelay Size: approx. 7.5 * 7.1 * 1.5 mm/ 2.95 * 2.80 * 0.59 inProduct Weight: 64.2 g / 2.26 ozPackage list:1 * Relay Module