1. APP remote control: With the for APP, you can remotely monitor the temperature of your home anytime and anywhere 2. Voice control: Works with for Alexa and for Home to achieve voice control. With just one voice , the smart thermostat can run, freeing your hands 3. Weekly programmable: Up to 48 schedules can be set in a day according to the needs and habits of users, and the room temperature can be adjusted regularly to provide a experience 4. Energy saving: Our heating energy saving concept is realized from various humanized . for App settings help you optimize energy use and choose the most suitable and economical heating mode 5. Support 9 languages: The display panel of the Star Ring smart thermostat supports 9 languages, ensuring that users with different language backgrounds can easily browse and manage settings Voltage/Frequency: 95-245VAC, 50/60Hz Current Load: 5A Communication Method: Wi-Fi Module Model: ZT3L Maximum RF Power: +20dBm Operating Frequency: 2.405-2.480ghz Zigbee Standard: IEEE 802.15.4 Sensor: NTC3950 10k Accuracy: ±1℃ Set Temperature Range: 5℃-35℃ Display Temperature Range: 5℃-99℃ Storage Temperature: 0℃-45℃ Energy Consumption: Less than 1.5w Timing Error: Less than 1% Protection Class: IP20 The product appearance and printed words depending on the batch, but this does not affect use Colour:Black Material:plastic Package Contents: 1 x Smart Knob Thermostat Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.