how do you sinc two receivers to one sensor?

long press the volume key for 3 seconds,enter into learning mode, release the volume key, program starts. The user manual will be introduced in detail.

Can i use power bank as power source?

Yes, you can. Receiver of the bell using 3 5(AA) alkaline batteries or Micro USB supply power( not included), Infrared curtains using 3 7(AAA) alkaline batteries or Micro USB supply power( not included).

how do i buy the remote controller ?

You can buy this https://www.amazon.com/dp/B01HUS7RP0/ref=sr_1_1?ie=UTF8&qid=1529542599&sr=8-1&keywords=B01HUS7RP0

Does the wind cause this to ring?

Thank you for your attention to HENDUN motion sensor doorbell. The wind will not cause the ringing. Thanks again.

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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HENDUN Motion Sensor Doorbell for Business, Bed Alarm for Elderly Dementia

Product ID: 72915073

Details

Brand
HENDUN
Color
1 Receiver & 1
Compatible Devices
Motion
Power Source
Battery
Product Dimensions
3.94"L x x

📶918ft wireless range

🔔36 ringtones + 4 volume levels

🛡️13-26ft infrared motion detection

156.45 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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Description

🚪 Stay alert, stay connected—caregiving made effortless!

DUAL POWER OPTIONS - Use AAA batteries for portability or USB-C for continuous power—flexibility that fits your lifestyle.
SMART FALL PREVENTION - Accurate floor-level motion detection helps protect seniors without false alarms or sleep disruption.
EFFORTLESS WIRE FREE SETUP - Pre-paired sensor and receiver for instant, hassle-free installation anywhere.
UNMATCHED LONG RANGE FREEDOM - Stay connected up to 918ft away—perfect for multitasking caregivers and busy professionals.
CUSTOM ALERTS FOR EVERY SITUATION - Choose from 36 melodies and 4 volume levels including silent LED flash mode to suit day or night.

The HENDUN Motion Sensor Doorbell combines a powerful 918ft wireless range with customizable audio-visual alerts and precise infrared motion detection (13-26ft). Designed for business entrances and senior care, it offers easy wire-free installation, 36 ringtone options, and dual power modes (AAA batteries or USB-C). Ideal for fall prevention and entry monitoring, it empowers caregivers and professionals to stay informed without compromise.

Specifications

ASIN	B077VV8ZJ1
Audible Noise	113 db
Battery Description	Alkaline
Best Sellers Rank	#37,081 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #34 in Door Bells Chimes
Brand	HENDUN
Color	1 Receiver & 1 Transmitters
Compatible Devices	Motion Detector
Control Method	Remote
Customer Reviews	4.4 4.4 out of 5 stars (1,478)
Item Dimensions L x W x H	3.94"L x 1.97"W x 2.76"H
Item Highlight	Door Chime for Business, Entry Alert Store Welcome Buzzer Monitor , Fall Detection Alarm for Seniors , Caregiver Reminder
Item Weight	7.04 ounces
Manufacturer	Changzhou Hengdun Electronic Technology Co Ltd
Maximum Range	25.92 feet
Mfr Part Number	43239-217649
Model Number	43239-217649
Mounting Type	Wall Mount
Power Source	Battery Powered
Sensor Technology	Motion Sensor
UPC	664248632944
Unit Count	1 Count

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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Great price for an authentic product. Fast international shipping too!

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156.45 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

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