The outdoor alarm has 3 Level volume to adjust.If you use it indoors, you may need to adjust volume lower.The waterproof door alarm can be used outside/front door/gate/in-ground pool fence alarm.The highest volume 140 dB is loud enough to alert you.Protect your home security.Useful in various applications: pool safety alarm, sliding glass door, home security alarm, bedrooms, hotels, garage, apartments & dorm rooms. The alarm have 3 modes---Immediate alarm, doorbell, SOS. Easy to change working mode or turn it on/off by remote.Wireless control range up to 50ft.Easy to install: self-adhesive types or screw&strap (included). Requires 4xAAA batteries ( included). Magnetically triggered alarm when window/door is opened. The remote controller is easy to carry, it can be put in pocket or hung on neck.NOTICE: MAKE SURE THE GAP BETWEEN THE ALARM AND MAGNET PART WITHIN 0.59 INCHES / 1.5 CM. Package: Magnetic sensor *1 AAA battery (included)*4 Remote control*2 CR2032 battery (included)*1 Double Sided Tapex1 User manualx1