Feature:1. STABLE STRUCTURE: USB relay module is equipped with a stable performance USB to serial port chip and a microcontroller, you can use with confidence2. SMART CONTROL: The module can use the serial port debugging software to send serial commands on the computer to control the opening and closing of the 2 channel relay3. CHIP AND INDICATOR: Onboard high performance microcontroller chip, Type C control chip. With power LED indicator and relay status LED, more convenient4. LONG LASTING: USB relay module on board 2 channel 5V, 10A 250VAC, 10A 30VDC relay, possess long relay life, can work 100,000 times continuously5. VARIOUS PROTECTIONS: 2 channel 5V USB relay module come with overcurrent protecting and relay diode freewheel protecting, as well as optical coupling protecting, more reliableSpecification:Item Type: USB Relay ModuleMaterial: PCBPower Supply Voltage: 5VPower Supply Mode: Type C port or pinControl Interface: Type C interface or pinBaud Rate: 115200bpsLED Indicator: Power indicator and relay status indicatorCircuit Design: Overcurrent protecting and optocoupler protecting functionOutput Type: Relay common end, normally open, normally closed endLoad Type: Power supply in 10A 30VDC, 10A 250VAC load.Package List:1 x Relay Module1 x USB Cable1 x Jump Wire