Onboard square USB interface to connect stable The use of imported high-performance USB controller chip Use genuine loose music relay The grade PCB board production 4, 8-way power interface aside, connected to power, even if the computer off or unplug the USB from the computer, you can also relay remains set. 1-way and 2-way no power connector. Fixing hole size: 3mm, fixing holes central moments: 52.2mm * 36.6mm The relay is 5V loose music relay, the relay can control the maximum 250V, 10A AC load and 30V, 10A DC load The control terminal connection mode: NC / COM / NO. Package Contents: 1 x 2 channel relay module (If the number of products received is incorrect, please contact us . we will refund or give you a replacement)

We highly appreciate all customers opinions to improve the selling, also if anything you unsatisfied, please contact us for probable best solution. Package Contents: 1 x 2 channel relay module (If the number of products received is incorrect, please contact us . we will refund or give you a replacement). The relay is 5V loose music relay, the relay can control the maximum 250V, 10A AC load and 30V, 10A DC load. The use of imported high-performance USB controller chip. Onboard square USB interface to connect stable.