Shelly Plus i4 DC is an automation action controller with 4 digital inputs and Wi-Fi connectivity (plus Bluetooth for pairing). It is a input reader device, meaning it does not include relays and operates with low voltages (5 to 24V DC).

WiFi-operated relay switch, 1 channel 16A

Control wide range of home appliances and office equipment (lights, power lines, security systems, heating radiators, air conditioners, etc.) from anywhere with the smallest WiFi-operated relay switch, with Bluetooth connection
Wi-Fi operated - Connects to your Wi-Fi network. No HUB required!
Bluetooth - Add devices quick and easy via Bluetooth connection, using Shelly Cloud App
Dry contacts
Low voltage support
Extremely fast processor – ESP32
Enhanced safety - Over-temperature protection
Enhanced security - MQTT and WSS support, TLS and custom certificates support
Improved API interface

2 channel Wi-Fi relay with power metering and cover (roller) control

Shelly Plus 2PM is a one-phase, two channel smart relay supporting up to 10A per channel and 16A total current (18A peak). It is equipped with two power meters for each channel and an overpower protection function to limit your energy consumption. Cover (roller) control allows for the control and monitoring of roller shutters, blinds, curtains, gates, or other bi-directional AC motors.
Shelly Plus 2PM
Wi-Fi operated – Connects to your Wi-Fi network. No HUB required!
Bluetooth – Add devices quick and easy via Bluetooth connection, using Shelly Cloud App
2 channels on the same phase
Power metering on each channel
Cover (roller) control-automate and adjust the position of roller shutters, blinds, gates, curtains, awnings, sliding doors, other bi-directional motors
Wide range of voltage support
Scripting, schedules and webhooks

The Shelly Pro 1 is a DIN rail mountable, multiple switch. It can be used with Wi-Fi, LAN and Bluetooth connection.

The Shelly Pro 2 is a DIN rail mountable, multiple switch. It can be used with Wi-Fi, LAN and Bluetooth connection. The relay is mounted on a DIN rail in your breaker box.

3 channels DIN rail relay switch with Wi-Fi, LAN and Bluetooth connection

Professional 3 channels relay with Wi-Fi, LAN, and Bluetooth connection, suitable for home and facility automation with remote control. DIN rail mountable inside a breaker box. Enhanced safety features and compatible with most used home automation platforms.
Shelly Pro 3