Sanjie Door Window Alarm Sensors, 5 Pack, 125dB, Volume Control

Price: $32.99 - $28.89
(as of Oct 01, 2026 22:07:49 UTC – Details)

Product description

Door & Window Alarms: Guarding Security,Peace of Mind

Door Alarms for Home Security

When intruder invades home, the door alarm will sound 110dB to alert you and scare intruder away.

Door Alarms for Kids Safety

When kids want to sneak out to play, the door alarm will sound 100dB to alert you.

Door Alarms for Dementia

The door alarm will sound 100dB to alert you when a demented/concerned elderly person leaves house.

Pool Door Alarms for Children

The door alarm sounds 110dB to alert you when a child opens the door by the pool.

Open Door Alarm

The alarm will sound 110dB to alert you when your pet leaves the house.

1 Guard Home Security

2 Guard Kid Security

3 Guard Dementia Security

4 Pool Safety Alarm

5 Pets Out Alarm

Door Window Alarms Alarm Working Mode–Adjustable Volume

The volume of the alarm is adjustable: 110dB, 100dB. 3 Modes:110dB Alarm(loud enough), 100dB Alarm, 100dB Chime (dingdong 2 times).Meet your needs for different occasions.

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. SanJie DA03 Door and Window Alarm 3 Modes

Alarm Is Easy to Install

No wires or screws needed.Tear off the 3M double-sided tape on the back of the wireless alarm and install it on the door or window, etc. Turn on the switch, set the mode and ready to use. It is recommended that the alarm be installed indoors.

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. SanJie DA03 Door and Window Alarm-Easy to Install

Long Battery Life for Alarms

The alarm is powered by 3 LR44 button batteries supplied. Normal life of the alarm is up to 12 months. When the alarm is in low battery, the indicator light will flash to alert you.

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. DA03 Door and Window Alarm-Long Battery Life

1 3 Modes(Alarm/Chime) 2 Place of Use 3 Installation Methods 4 Alarm Battery

Scenarios of Use Home

The door and window alarms can be turned on in Mode 1 (110dB alarm) or Mode 2 (100dB alarm).

Rental Property

The door and window alarms can be turned on in mode 1 (110dB alarm).

Recreational Vehicle (RV)

The door and window alarms can be turned on in mode 1 (110 dB alarm).

Office

The door alarm sensor can be set in mode 3 (100dB chime):dingdong 2 times.

Are the alarms easy to install?

YES. Just remove the 3M double-sided tape and ensure the gap between the alarm does not exceed 0.4in.The arrows of the alarm are aligned with each other.

How long do the batteries typically last?

The batteries are already built into the alarm. 1 Alarm Pack for 3*LR44 batteries and will last 12 months normally.

Can the volume of the alarm be adjusted?

YES. The alarm has 3 modes, Mode 1: 110dB alarm, Mode 2: 100dB alarm, Mode 3: 100dB “ding dong” 2 times. The alarm maximum sound loud enough to deter intruders.

Are the alarms suitable for use on sliding doors or windows?

YES. Alarms are generally available for sliding doors/windows. For best performance, make sure the alarm is mounted in a position that detects movement.

Does alarm false alarm easily?

NO. Alarm sounds immediately upon separation and lasts for 30s before stopping unless the door/window is closed.

Window & Door Alarms

Add to Cart

Add to Cart

Add to Cart

SanJie Door Chime

Customer Reviews

4.4 out of 5 stars 1,766

—

4.1 out of 5 stars 71

4.3 out of 5 stars 507

4.3 out of 5 stars 1,579

—

3.9 out of 5 stars 972

Price

$33.99$33.99

—

$17.81$17.81

$18.99$18.99

$23.79$23.79

—

$33.14$33.14

Quantity

5 pack

1 pack

1 pack

1 pack

2 Sensor+1 Receiver

3 Sensor+1 Receiver

2 Sensor+1 Receiver

Volume

110dB/100dB

0-120dB

0-110dB

0-120dB

0-110dB

0-110dB

0-110dB

Ringtone

alarm/ding dong

Chime / alarm

Chime / alarm / voice

ding dong/di di di

Chime / alarm

Chime / alarm / voice

Chime / alarm

Battery Type

LR44 battery

AAA 1.5V battery

AAA 1.5V battery

AAA 1.5V battery

CR2450

AAA 1.5V battery

CR2450

Switch(ON/OFF)

✔

✔

✔

✔

✔

✔

✔

Wifi

✘

✘

✘

✘

✘

✘

✔

Peace of Mind – Door window alarms guard you and your home’s security. Alarms can also keep the safety of kids as well as the elderly who need care
Wide Use – Magnetic sensor will alarm or chime if separated.Can be used in pool, home, apartment, store, office, garage, RV, warehouse, hotel and more. Alarm sensor can be installed on sliding door/window, cabinet, drawer, etc
Easy to Install – Tear off the 3M double-sided tape on the back of the wireless alarm and install it on the door or window, etc. Turn on the switch, set the mode and ready to use. It is recommended that the alarm be installed indoors
Volume Control – Alarms have 3 modes:125dB Alarm(loud enough), 100dB Alarm, 100dB Chime (dingdong 2 times). When the door window sensor is opened,it will alarm continuously for 34 seconds and will not stop until the window or door is closed
Long Battery Life – Powered by 3 LR44 button batteries supplied. Normal life of the alarm is up to 16 months. When the alarm is in low battery, the indicator light will flash to alert you
Customers find the door window alarm sensors to be of good quality, easy to use, and effective for security, particularly for keeping young children safe. Moreover, the product offers great value for money, with one customer noting it’s a cheaper alternative to pricier sensors. However, the reliability and volume receive mixed feedback – while some say it works amazing and is super loud, others report it wouldn’t work again and can be heard from the second floor. Additionally, the adhesive performance is mixed, with some saying they stick great while others mention problems with adhesion.