This is a SONOFF RE5V1C Wifi DIY Switch 5V DC Relay Module. The 5VDC input, nano size, and dry-contact output make it different from Traditional SONOFF product, this product is a wireless switch supports inching /self-locking mode. Users can add the device to the APP eWeLink in order to remotely control connected home appliances or devices.

Features:

1. Nano Size
2. Dry Contact Output
3.  5VDC low voltage input
4. self-locking and inching mode
5. Turn on/off the device even when WiFi has no Internet access
6. Free iOS and Android mobile App eWeLink