Size：6.5*3.4*1.65cm Weight：42 grams Soft Alarms: Alert after 1 minute (for 2 seconds), a second alarm after 2 minutes (for 4 seconds) when the refrigerator door is still open or open. Continuous Alarm: Alert after 3 minutes (stay 60 seconds) will help you close the refrigerator or freezer door in normal situations. Repeating Siren: Loud mode includes an additional 110dB siren every 4 minutes (stay 20 seconds), activate by using the SET button (4 confirmation beeps). Four modes: silent (80 dB), medium (85 dB), normal (90 dB with a beep every 10 s), loud (95 dB, with a beep every 10 seconds and a 110 dB siren every 4 minutes). Easy to use: FRIDGGI beeps at a low volume when you exceed the allowed space between the alarm and the mini sensor; open/close the door to check before peeling off the double-sided tape.