About the Shelly Plus Devices Automation Module Temperature Sensor Add-on Measure and Control Precisely The Shelly Plus add-on module is a galvanically isolated sensor interface for all Shelly Plus relays. Use it to measure temperature and humidity using its 1-Wire terminals or connect multiple analog and digital sensors for complex automation and increased efficiency. High Compatibility The Shelly Plus add-on module is compatible with most Arduino sensors! Use its digital or analog inputs to measure desired parameters and create complex automation scenes based on sensor data. FEATURES: Can be used with up to five DS18B20 sensors or one DHT22 sensor Has an analog and digital input DHT22 Sensor - if you want to monitor temperature and humidity Compatible with Shelly Plus 1/1PM, Shelly Plus 2PM, Shelly Plus i4/i4DC TECHNICAL SPECIFICATIONS: Power Supply: 3.3 V (from Shelly Plus device) Power Consumption: < 0.5 W (without sensor) Digital Input: -15 V to 0.5 V (True) / 2.5 V to 15 V (False) Analog Input Range: 0 to 100% Analog Input Ratio Limit: 1% Voltmeter Range: 0 to 10 V Voltmeter Ratio Limit: 0.1 V Dimensions: 37x42x15 cm Weight: 105g