note: The relay is a passive output that only functions as a switch and does not output any electricity! Coil voltage: 5V Input current: greater than 300MA Wiring method: NC / COM / NO PCB size: 56.5mm * 40. 6mm Product weight: 31g Can control AC 250V, 10A AC load and DC30V 10A DC load 1.Square USB interface on board, stable connection 2.Using imported high-performance USB control chip 3. Use genuine Songle relay 4.Military-grade PCB board production 5.2 way reserved power interface, after the power is connected, even if the computer is turned off or the USB is unplugged from the computer, the relay can also keep Set the status. There is no power interface for 1 and 2. 6. PCB size: 56.5mm * 40.6mm 7.Fixed hole size: 3mm, fixed hole center moment: 52.2mm * 36.6mm Note: Due to the characteristics of the USB protocol, this module is not suitable for use in places with large electromagnetic interference! If you want to use it, please take electromagnetic shielding measures and purchase USB data cables with electromagnetic shielding. Color: Red Material: plastic Package Contents: 1*USB Relay Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.