The SolarQ AIR HEATER application allows you to select the temperature of a heating product using your smartphone and provides an automatic adjustment function to maintain the users desired temperature.1) Specifications - Operating system: Android Jelly Bean (4.3) or higher - Environment: Bluetooth 4.0 / USB 2.0 or higher - Temperature sensor measurement range: 45℃ ~ 120℃ - 4 level setting temperature: 45℃ / 48℃ / 51℃ / 55℃ - Smartphone controllable distance: within about 10m - Power supply: 5V 2.1A or less / Auxiliary battery for smartphone charging (Compatible with all Power Bank models) - Usable time: Approximately 10 hours at the lowest temperature / Approximately 6 hours at the highest temperature (Based on 10,000mAh and may vary depending on battery performance and environment)