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 confidence 2. 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 relay 3. CHIP AND INDICATOR: Onboard high performance microcontroller chip, Type C control chip. With power LED indicator and relay status LED, more convenient 4. LONG LASTING: USB relay module on board 2 channel 5V, 10A 250VAC, 10A 30VDC relay, possess long relay life, can work 100,000 times continuously 5. VARIOUS PROTECTIONS: 2 channel 5V USB relay module come with overcurrent protecting and relay diode freewheel protecting, as well as optical coupling protecting, more reliable Specification: Item Type: USB Relay Module Material: PCB Power Supply Voltage: 5V Power Supply Mode: Type C port or pin Control Interface: Type C interface or pin Baud Rate: 115200bps LED Indicator: Power indicator and relay status indicator Circuit Design: Overcurrent protecting and optocoupler protecting function Output Type: Relay common end, normally open, normally closed end Load Type: Power supply in 10A 30VDC, 10A 250VAC load. Package List: 1 x Relay Module 1 x USB Cable 1 x Jump Wire