Controller chip: Onboard high-performance microcontroller chip Control chip: Onboard CH340 USB control chip LED indicator: Onboard power LED indicator and relay status LED indicator Relay: Onboard 5V, 10A/250VAC, 10A/30VDC relay, relay life is long, can be continuously attracted 100,000 times Protection function: With overcurrent protection and relay diode freewheeling protection function Interface: Type-c interface Colour: Material: plastic note: There are some differences in color printing in different production batches, which does not affect the use Package Contents: 1 x 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.