Sanjie Door Alarm with Instant and Delayed Alerts 30s/1min/2min/4min, Door Window Ajar Alarms for Kids Safety/Home Security, Volume 0-120dB, Left Open Alert for Freezer Fridge Home, 3 Sensor

Door Alarms When Opened: The door alarm sensor features both instant and delayed alert functions. It offers two ringtones: Siren Alarm/Chime: di di di.... It alerts you when the door is opened or door left ajar, for total peace of mind at home and work
Easy Installation and Setup: Tear off the 3M tape on the back of the alarm sensor and firmly stick it to doors, windows, or other objects. Or install using the screws provided.Select alarm or chime mode, set your preferred alert timing mode, and begin use.Indoor installation is recommended(Note: Installation distance between sensor and magnet strip: Non-metal doors <1.38 inches; Metal doors <0.98 inches)
5 Modes: Mode 1 for instant alarm/chime. Modes 2-5 offer delayed alerts (30s, 1min, 2min, 4min).All Modes feature intermittent alerts,not continuous alerts(For example:sounds for 10s, pauses for 10s, then repeats).Alert mode until door is closed or any button on the alarm sensor is pressed
Widely Applicable: No false alarm with this wireless door chime/alarm. The open alarm sensor installs easily on the sliding door, window, front door, patio door, Freezer,Refrigerator, cabinet, drawer, and more. Perfect for freezer alarm,door alarm for kids safety, home security, and dementia patients.Widely used in home, apartment, basement,office,pool, grocery store,dormitory,store, garage, RV, warehouse, hotel, and more
Volume Control and Long Battery Life: The door sensor alarm has 5 volume levels: 0dB-120dB. 120dB is loud enough to be heard.Powered by 2 AAA 1.5V batteries, lasting up to 12 months. When the door alarm battery is low, the ,the alarm will beep to alert you. No worries about rapid battery drain or unexpected power loss