Features: -Specially design for rental apartment, villa, family security -Wireless remote control to arm or disarm. -Super loud alarm of 105dB, scare thief away. -Powered by 2 pieces of AAA alkaline batteries(not included). -Low power remind with LED indicator -Magnetic sensor, door and window motion detector. -Can easily mount to windows or doors with included double sides adhesive tape, no tools required. -Door bell function, reminding people in house open door for you. Specifications: Alarm size: 85 * 40 * 15mm / 3.3 * 1.6 * 0.6in Alarm volume: 105 dB Host Battery: 2 * AAA alkaline battery operation (not included) Remote control battery: 1*27A12V ( included) Remote Control Distance: about 30M without barrier Battery life: more than 1 year Working temperature: -10 ~ 60°C Working humidity: