LIMITED OFFER The latest version of the WT20 Volt Polska Thermostat: USB power supply + 2x AA BATTERY POWER (Under the white cap) The thermostat can be controlled from anywhere in the world (Must be connected to the internet). The most important advantages: Power supply via USB or 2x AA batteries/rechargeable batteries; Large, clear, elegant backlit display; Possibility of control via smartphone; Programmable 4 cycles each day; Wi-Fi wireless connectivity; The display shows the set and measured temperature and time; The thermostat and receiver can be mounted on the wall; The thermostat can also be used in a standing position; Compact dimensions; Finished with elegant, smoked glass; Radio receiver and USB charger included; Smartphone control (The thermostat also works with TUYA applications. ); Fits all central heating boilers with a thermostat output; WIRELESS WIFI ROOM TEMPERATURE CONTROLLER Volt Polska Thermostat power supply: USB, 5V / 1A or AA battery/rechargeable battery (not included); Built-in memory type: EEPROM ; Receiver voltage: 230VAC, 50/60Hz ; Maximum voltage, load: 250VAC/10A ; Frequency: 868Mhz; Programming options: 7 days, 4 cycles each day ; Temperature setting: 5-35°C ; Sensitivity: +-0.5°C ; Operating range: 0 - 50 °C ; Relative humidity: 85% ; Sensor: NTC 10K, 3950 ohm at 25 °C ; Certificates: CE, ROHS, RED ; Dimensions Transmitter: 126 x 98 x 23.5mm ; Dimensions Receiver: 90 x 90x 26mm ; Weight: Transmitter: 0.281kg ; Weight: Receiver: 0.13kg ; Protection: IP20; Housing: ABS UL94-5 (fireproof); Mounting: wall-mounted or standing ; The WT-20 room thermostat is used to regulate the temperature in central heating systems. It maintains a comfortable or economical temperature depending on the set program and time. It reduces energy costs by reducing the temperature in the absence of users. The control panel has a built-in air temperature sensor and connects wirelessly to the controller connected to the central heating furnace. The thermostat can be controlled by a smartphone using a dedicated application (to be downloaded). Wireless connectivity (Wi-Fi) Communication via Wi-Fi allows you to easily control the thermostat from anywhere in the home. Simply download the Smart Life app from the Google Play store and pair the device with your smartphone. Key advantages: Large, easy-to-read backlit display ; Programmable 4 cycles each day; The display shows the set and measured temperature and time; The thermostat can also be mounted on a wall/other surface or placed on the included stand; Glass-finished control panel; Compact size of the thermostat and receiver; Open Window Mode (OWD) When open window detection is enabled in the settings, the device will automatically turn off the heating when it detects a sudden drop in temperature (2°C over 15 minutes by default). This is the thermostat's correct response to a situation where a window/door is opened without turning off the heating. The device will return to normal mode after 30 minutes. Pressing any button during OWD mode will immediately turn it off.