features: adjustable standby screen brightness from 0–100 percent designed for water heating, electric floor heating, and gas boilers secure child-lock function to prevent accidental changes intelligent linkage with sensors for energy-saving automation energy-saving mode reducing electricity costs by up to 20 percent modern compatibility with multiple heating systems ambient back light that can be turned on or off smooth temperature adjustment through the smart knob works with the Smart Life and Tuya apps requires Zig Bee gateway for full smart functionality specs: voltage and frequency: 95–245V AC, 50/60Hz current load: 5A for water heating and boilers, 16 A for electric heating communication method: Zig Bee module model: ZT3L maximum RF power: 20dBm operating frequency: 2.405–2.480GHz standard: IEEE 802.15.4 sensor type: NTC 3950, 10K accuracy: ±1°C set temperature range: 5–35°C display temperature range: 5–99°C storage temperature: 0–45°C power consumption: under 1.5W timing error: under 1 percent casing: fireproof PC plus ABS protection level: IP20 requires ZigBee gateway (sold separately)
