1,Power Isolation: This 8 channel relay module provides stable isolation voltage, the isolated terminal does not require additional power supply. 2,Photocoupler Isolation: This 8 channel relay module possesses photocoupler isolation, prevent interference from external high‑voltage circuit connected to the relay. 3,Easy to Debug: This 8 channel relay module has tapping USB port and BOOT pin, make it easy to debug without detaching the enclosure. 4,Contact Rating: Premium relay, contact rating is 10A AC or ≤10A 30V DC. PWR indicator, RGB LED, and passive buzzer outside the enclosure. 5,Easy Installation: This 8 channel relay module adopts ABS protection enclosure with rail‑mount support, Easy to install and safe to use. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store