Highlights

• ESP8266-based inline Wi-Fi relay (10 A) for converting existing circuits into smart switches.
• Ships with eWeLink app/cloud support; widely reflashed with Tasmota/ESPHome for local MQTT/REST control.
• Includes manual push button and GPIO breakout for sensors or buttons.

Popular for DIY automations where you want inexpensive Wi-Fi control behind an outlet or inside an enclosure.

Flash custom firmware (Tasmota/ESPHome) and configure MQTT topics; stock firmware relies on the eWeLink cloud.