The Shelly Uni came out in the fall of 2020 and became the smallest smart device right away. With the ideal size of 20 x 33 x 13 mm (0.78 x 1.29 x 0.5 in), Shelly UNI is the smallest universal module that can make any old device smart. This little relay knows a lot:
- Flexible universal power supply: Shelly UNI can be powered with a wide range of 12V-36V DC and 12V-24V AC.
- Universal digital inputs: includes 2 digital inputs, which can support different voltages and can work separately from 2.2-36V DC and 12-24V AC.
- Universal outputs: The two potential-free outputs allow control from the inputs or separately and can switch up to 36VAC and 24VDC, with a maximum current of 100 mA each.
- Universal ADC: The ADC range can measure any voltage from 0 to 30 VDC. The dual range from 0-12V and 12-30V offers exceptionally high precision.
- Universal temperature and humidity sensors: Shelly UNI accepts up to 3xDS18B20 temperature sensors or 1X humidity sensors, making it possible to trigger outputs, local and cloud scenes.
- Universal protocols: Shelly UNI is compatible with REST, MQTT, CoAP, Alexa, Google Home and Samsung Smart Things, making it highly compatible with all major home automation platforms.
- Universal resistance: Even if there is no plastic cube, the transparent insulating cover over the chip protects it from high humidity, dust and the threat of short circuits during its long working hours.
This small device can fit anywhere you want. Even if there is no plastic box to place it, the transparent cover over the chip isolates it and protects it from possible dangers for the device or household appliances. 
Tip: The wide power range and flexibility make Shelly UNI the best choice for vehicle monitoring and control. Make it as comfortable as being at home with one of the best home automation solutions! Power control, light control, door status, air temperature, water temperature, water level monitor, leaks.
It offers you unlimited flexibility: The two available digital inputs allow the detection of any voltage from 36V and automatically send a notification to your phone, activating a Shelly Cloud scene or turning on the outputs. You can connect Shelly to your old sound and give it smart features, like getting a notification on your phone every time someone rings the doorbell.
You can build it into household appliances to provide them with intelligent functions. The dual range of Shelly UNI allows you to connect any analog sensor and measure it. Connect your liquid level sensor to Shelly UNI and measure the level or even automate the filling system.
Free outputs with double potential: Shelly UNI has 2 potential-free outputs that can switch to 36VDC and 100mA. Stop waiting in the morning for your coffee machine to heat the water and prepare your coffee! Connect it to Shelly UNI and start it remotely as you wish, or on a set schedule.
The cheapest way to measure the temperature no matter where you are. Shelly UNI accepts the most popular temperature sensor DS18B20, which can be used practically anywhere in the world. If you want to monitor your pool, terrace and air temperature together, just connect 3xDSB18B20 to Shelly UNI and enjoy.
One app, countless possibilities: With the world's best cloud service, easy-to-use interface, scenes, massive control and more, the Shelly Cloud app allows you to control your home from anywhere. Each Shelly can be integrated and works with all other Shelly devices in the Shelly application.
