YMYNY Pack Freezer Door Alarm, Window Security Alarm, Wireless Refrigerator Alarm 3/15/30/60 Seconds, 4 in 1 Door Sensor Doorbell Open Alarm Loud 108dB mumu

4 in 1 Mode: This alarm with 4 modes. 1. Timed Alarm (sounds 'Di-Di-Di' from 0dB to 108dB if the door is left open for 3/15/30/60s) 2. General Alarm (alarm stops if the door is closed); 3. Constant Alarm (constant alarm even door closed); 4. Door Opening Beep (sounds "DingDong" once the door is opened) 108dB Loud Alarm: The door and window alarm helps effectively deter intruders/burglars with a loud 108dB alarm. You can easily set the suitable mode according to your needs. Easy to Install: Simple peel and stick installation, easy to install on most freezers/refrigerators or any doors without tools. Package including 2 fridge alarms, 2 magnetic strips, double-sided sticker, user manual. The electronic instruction is on the 8th picture. Installation note: Be sure to close the alarm and magnetic strip, the installation distance between them should not exceed 0.78 inches. The 2 parts must be aligned by their alignment arrow. 2 AA batteries can last 2 years. (Batteries are not included)