NineLeaf Freezer Door Alarm Door and Window Alarms for Home Security 3/15/30/60S 4-In-1 Door Magnetic Refrigerator Door Open Alarm Delayed Door Closing Bell for Home Business Office Shop 100PK

NineLeaf Freezer Door Alarm with Delay When Left Open,Door Window Alarm When Opened (3/15/30/60 Seconds) · General Alarm: Triggers when a door or window is opened. · Constant Alarm: Continues for at least 10 seconds even after the door or window is closed. · Closing Reminder: Alerts you to close a door or window if it's left open. · Doorbell Mode: Plays a clear "ding-dong" sound when the door opens. Technical Specifications: Noise Level: 108 dB Mounting Type: Self-Adhesive An alarm need 2 AAA alkaline batteries ( not included ) They can work for at least a year with low-consumption design Low battery reminder: When the battery is low the red indicator light will flash 1 per second reminding you to replace the battery in time. Package Including: Door Alarm Magnet Sensor Adhesive Tape User Manual