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Door Left Open Alarm with Delay(Instant/30s/1min/2min/4min), 1 Sensor
✅ In stock
F
Grade
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Oct 5, 2026 8:51 AM · Prices & availability subject to change
Is This a Good Price on Amazon?
💤 Not a Deal- 💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
0/22
Market Standing
0/20
Deal Strength
0/20
Momentum
0/10
📝 Product Overview
🏪 Sold by
SanJie Store
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓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
✓One Instant Alarm Mode: The alarm sounds as soon as the door is opened. It beeps for 10 seconds, stops for 10 seconds, and repeats until the door is closed or any button on the alarm sensor is pressed. This alarm is ideal for monitoring kids safety, seniors with dementia safety, and home security
✓Four Delay Alarm Modes: Door left open: delayed alarm after 30 seconds/1 minute/2 minutes/4 minutes.Delay 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.Suitable for fridge/freezer: prevents food spoilage. Suitable for room: prevents loss of cool air from air conditioners in summer or warm air from heaters in winter. Also suitable for pool, garage, and other location
✓Volume Control & 2 Tones: The door sensor alarm has 5-levels volume adjustment: Mute-120dB. 120dB is loud enough to be heard. It offers two tones: Siren Alarm/Chime: di di di....
✓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:Long Installation distance between sensor and magnet strip: Non-metal doors <1.38 inches; Metal doors <0.98 inches)
✓Widely Applicable: No false alarm with this wireless door alarm. The open alarm sensor installs easily on the sliding door, window, front door, patio door, fridge,freezer,refrigerator, garage,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, RV, warehouse, hotel, and more
✓Long Battery Life & Low Battery Alert: Alarm is 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
⚙️ Specifications
Color
White
Brand
SanJie
Power Source
Battery Powered
Number of Batteries
2 AAA batteries required. (included)
Noise Level
120 db
Audible Noise
120 db
Mounting Type
Door Mount
Sensor Technology
Contact Sensor
Item Highlight
Window Fridge Door Alarm for Kids Safety,Volume Adjustment Mute-120dB,2 Tones,5 Modes,Ajar Alert for Freezer Garage Home
Manufacturer
SanJie
Manufacturer Warranty Description
Lifetime warranty
