Specifications: 108 dB Loud Alarm 4 Feature Modes --- Time Delay, General Alarm, Constant Alarm, Doorbell, easy set the appropriate mode according to your need. Wireless Alarm Battery Operated, it need two AAA alkaline batteries ( not included ). Low Consumption Design, they can work for over 2 years. Low Battery Warning, when it need replace batteries, the LED light will flash once every second. Self-Adhesive, easy to install and operate. Product Size: 3.4*1.7*0.4 inch Multi-Using: 1. Fridge, Refrigerator, Freezer door alarm Reminder. 2. Window door alarm for home safety 3. Cabinet door alarm in store security. Package Including: 1 x refrigerator alarms 1 x magnetic stripe 1 x user manual Wireless freezer alarm: It will only alert you when freezer door has been left open for 3s/15s/30s/60s, it will not annoying you while you want the door open, you can easily to set the delay time as your need 108dB Loud Alarm: Door and window alarm helps detecting intruder/thieves effectively by 108dB alarm, also door open chime will remind you if children/pet or others are coming/leaving. 4-in-1 Mode: This alarm with 4 modes. 1. Time Delay Alarm (sounds ?Di-Di-Di? from 0dB to 108dB if door stays open for 3/15/30/60s) 2. General Alarm (alarm stop if door closed); 3. Constant Alarm (constant alarm even door closed); 4. Door Open Chime (sounds ?DingDong? once door opens) Easy to Install: Simple peel and stick on most of freezers/fridges or any door without any tools. Widely Use: Magnetically triggered door alarm sensor protecting house by door window entry and suitable for safe box, cabinet, Freezers, Refrigerators, pool sliding door, store, office, apartment, Hotel etc. Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-6305 days. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don't hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it!