Dimensions: 6.5*3.4*1.65 cm Weight: 42 grams Soft alarms: 1 minute warning (for 2 seconds), a second alarm after 2 minutes (for 4 seconds) when the refrigerator door is still open or open. Continuous alarm: 3 minutes warning (stays for 60 seconds) will be displayed helps you close the refrigerator or freezer door in normal situations. Repetitive siren: Loud mode includes an additional 110 dB siren every 4 minutes (20 seconds remaining), which can be activated by using the SET button (4 beeps for confirmation). Four modes: silent (80 dB), medium (85dB), normal (90dB with a beep every 10 seconds), high (95dB, with a beep every 10 seconds and a 110dB siren every 4 minutes). Easy to use: FRIDGGI will emit a low volume beep when the allowed space between the alarms and the mini sensor is exceeded; open/close the door to check before removing the double-sided tape.