Equipped with stable USB-to-serial chip and microcontroller, serial port debugging software can be used on the computer to send serial port commands to control the opening and closing of the relay With overcurrent protection and relay diode freewheeling protection function Onboard 5V, 10A/250VAC, 10A/30VDC relay, long relay life, can be continuously attracted 100,000 times Onboard power LED indicator and relay status LED indicator The default communication baud rate of the LC USB switch is: 9600BPS Controller chip: Onboard high-performance microcontroller chip Control chip: Onboard CH340USB control chip Interface: Type-c interface Colour: Blue Material: PCB Package Contents: 2 x USB Relay Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.