This is USB controlled relay Board with 4 channels. It's used the HID technology, so no need to install any driver in windows system and you can easy to use. We also provide an application and the C++ develop library that you can easy to integrate this module to your project.
This module can be used:
1. Home automation
2. Robotics Control
3. Control doors and windows via windows system
4. Controller power supply
Specification:
Relay type: 12V relay
Contact type: NC / COM / NO
Input current: ≥300mA
Input voltage: DC 12V
Max load: AC250V/10A or DC30V/10A
Supports Win7/XP, 32/64-bit systems