Shelly 1PM WiFi single channel relay with consumption monitoring

Shelly 1PM is the power meter equipped version of Shelly 1. This is one of the smallest open-source devices with WiFi access to intelligent control circuits. Thanks to its small size, you can embed it behind a standard power socket / light switch or in an electrical cabinet.
If you mount the Shelly 1PM behind them, you can control the lights by keeping the existing switches and monitor their status (on / off).
Capable of alternating and cross-switch operation. It has power metering.
Timer function:
set on/off schedules for any weekday support
dawn/dusk adjusted schedules
Free Cloud service and smartphone app based on the manufacturer's Mongoose OS are also available for Shelly 1PM smart control.
Embedded web server, configurable from the web interface via local network. LAN compatible, controllable via local network without Internet access and Shelly Cloud. Supports MQTT.
Compatible with Google Home and Amazon Echo voice control.
The device works with an ESP8266 based control, the firmware can be changed as you like via the built-in pin-bus (Sonoff-Tasmota, ESPEasy, ESPurna e.g.), it can be easily integrated with your own automation server.
Like other smart switches, this device must be connected to both the live wire and the neutral wire.
Power supply: 110-230V, 50 / 60Hz AC, 24 - 60V DC
Peak output: 3500W / 16A