6Pcs Wireless Alarm System Door and Window Security Alarm Wireless Time Delay Alarm Magnetic Triggered Door Open Chime for Home Security

Features: 1. New and high quality 2. Super loud 90 dB alarm 3. Convenience in installation--just peel and stick 4. Super environmental suitability and stability 5. Dustproof and insect prevention 6. Easily mounted by adhesive. Type to window or door. Ideal entry warning for homes, apartments, mobile homes, do rms, offices, hotel rooms, garages, and more! 7. Magnetic sensor switch detects entry protecting your home or office whether you are in or out 8. Operated by 3pcs of 1. 5V LR44 / AG 13 button cell ( included ) Specifications: 1.Sensor type: alarm 2.Alarm type: sound 3.Material: plastic 4.Color: White 5.Size: 2.5 x 1.3 x 0.8 inch Package Included: 6 x Magnetic Sensor 6 x Magnetic Stick 18 x LR44 Button Battery