The Shelly Pro 4PM is a DIN-Rail mounted 4-channel smart switch, part of Shelly's Pro range. It can connect to the wider Shelly network via Bluetooth, WiFi, or the embedded LAN port. The Pro 4PM can monitor and control up to four separate channels, with each device or system rated up to 16A (maximum 40A total). It features accurate power-monitoring capabilities, storing data on connected device's power usage every 60 seconds, either locally or in the cloud. The device also houses a 1.8" colour screen with navigation keys for easy management. It supports control via the Shelly Smart Control app or voice assistants like Alexa, Google Home, or SmartThings, with no hub required. The Shelly Pro 4PM can be used as a stand-alone solution or as a supplement to an existing automation system. Possible applications include office lighting, ventilation systems, heating systems, and AC motor pumps. Enhanced safety features include over-temperature, overpower, and overvoltage protection.