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2 Pack Window/Freezer/Fridge Door Alarm with Delay Upgrade 3/15/30/60 Seconds for Home Safety Product Feature: 108 dB Loud Alarm 4-in-1 Mode: 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) Product Size: 3.4*1.7*0.6 inch Package Including: 2* Freezer Alarm 2* Magnetic Stripe Double Sided Sticker User Manual How to install ? Step 1. Stick the alarm and sensor separately to each sides of the door/window, Step 2. Please pay attention to the Alignment Marks and make sure to keep their horizontal distance less than 10mm How to use ? Step 1. Press the button to choose the function you need. Step 2. Press the power on button and hold around 4 seconds to end the functions. So easy, right? Note: 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. 100% QUALITY GUARANTEE! We Provide 360-day Product Warranty