Home Security Wireless Remote Control Door Window Siren Magnetic Sensor Alarm Warning, 1 Remote Controller + 3 Magnetic Sensors 1. Low-consumption design, which makes it can work a long time. 2. Remote control operation makes it easy to operate. 3. It has the function of arm, disarm, emergency alarm and doorbell. 4. 105dB ultra-loud alarm design, effectively frighten thieves who want to break into your home. 5. Magnetic sensor, door and window motion detector. 6. Can easily mount to windows or doors with included double sides adhesive tape, no tools required. 7. Doorbell function, reminding people in house open door for you. 8. Specially design for rental, apartment, villa, family security. 9. Help to keep yourself and your property safe and secure. 10. Magnetic Sensors Powered by 2 x AAA alkaline batteries (not included). 11. Remote Controller Powered by 12V27A alkaline batteries.