Features:Anti-Theft Assistant Door Sensor: Seamlessly integrate your security-system with your smart appliances for increased comfort and total control with our smart door sensor.Quick and easy: Our products are easy to install and can be integrated with existing security-systems or used as standalone devices, providing a seamless connection.Unique design, beautiful appearance. It can be connected through mobile Apps, fast pairing, easy to use.Long-lasting battery life: Low power consumption, powered by 2AAA batteries (not included), durable.Widely used: Can be installed in doors, window, drawers, cabinets, safes, basements, bedrooms and other important areas.Notice:1.Actual color may be slightly different from the image due to differentlight effect2.Please allow 1-3cm deviation due to manual measurementDescription:Size: 7*2.5cmPower supply: two AAA batteries (not included)Input voltage: DC3V LR03Quiescent current: 10uAAlarm current: 160mALow voltage and under voltage: 2.7VWifi: 802.11b/g/nMagnetic control distance: 15mWorking temperature: -10-50Working humidity: maximum 95%RH