Features 1.4 Modes: General alarm. It will stop when the door is closed; 2. Continuous alarm. It will continue to alarm even if you close the door; 3. Delayed alarm. Free to set the time interval, such as 2s, 5s, 10s, 20s, and the volume increases gradually from 0dB?108dB; 4. Doorbell mode. Ding Dong" sound when open the door. 2.High Efficiency: Wireless home security burglar alarm can be used for doors, windows, refrigerators, filing cabinets, pool sliding doors, etc. The 108dB alarm sound can effectively deter intruders or thieves. At the same time, it can notify you of what is happening. 3.Power Supply: Home security burglar alarm requires 2 AAA alkaline batteries. Long standby time, no need to replace the battery frequently, can standby for 2 years. When the battery is low, the LED flashes once per second, indicating that the battery is low. 4.Applicable People: The wireless home security burglar alarm will sound when elderly and dementia children open windows or interior doors. Keeps children away from cabinets, floor sinks, and is also useful for monitoring wandering, sleepwalking, elderly, etc. 5.Easy to Use: The wireless home security burglar alarm is easy to install, just peel off the sticker and stick it directly to the location you want to install. First of all, please determine where you want to paste. specificationItem Type: Wireless Door Alarm_x000D_ Material: ABS_x000D_ Color: White_x000D_ Function: Alarm_x000D_ Scope of Application: For home, office, bike, etc._x000D_ Battery: AAAx2 (Not Included)_x000D_ Alarm Sound Volume: 108dB PackageList 1 x Wireless Door Alarm (Batteries Not Included) 1 x Magnet Box 3 x Paste 1 x Manual