This is USB controlled relay module with 8 relays SRD-05VDC-SL-C.
This 8 channel USB controlled relay module is used the HID technology, so there is no need to install any driver in system.
Convenient and very easy to use.
Using it for simple ON/OFF switching electrical devices for home automation- home lights, DC motors, solenoids etc.
Led for each relay output: Power Led / USB led