Features 1、Magnetic Sensor Detection: The wireless magnetic induction switch can monitor the open or closed status of door and window, the induction range is approx. 8‑15mm/0.3‑0.6in 2、130 Db Alarm: When someone illegally opens the door or window, the alarm will immediately emit 130 dB siren to warn the intruder to leave and remind the owner 3、Adjustable Alarm Sound: This door and window alarm has three tones, the volume can be adjusted, and the alarm can be delayed for 30 seconds 4、Easy Installation: This door window alarm can be easily mounted on window and door with adhesive, firm and not easy to fall off 5、Application: This door window alarm suitable for home, apartment, mobile home, office, hotel room, garage and etc. Specification Item Type: Door Window Alarm Material: ABS Battery: 3 x Button Battery LR44 1.5V 140mah(Built in) Working Temperature: -10°C-50°C Volume: 130DB Induction Range: Approx. 8-15mm/0.3-0.6in Standby Time: About 1 year Package List 1 x Door Window Alarm(Battery built in) 1 x Magnetic Strip 1 x Double Sided Tape