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.Customs & duties included in the price

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

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 long-range signal

🔊113dB max volume with 36 ringtones

🛡️13-26ft precise infrared detection

R1088

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In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚪 Stay Alert, Stay Connected — The Ultimate Motion Sensor Doorbell for Care & Business

SMART FALL PREVENTION - Detects foot movement on the floor, reducing false alarms and protecting seniors with dementia.
DUAL POWER FLEXIBILITY - Use AAA batteries for portability or USB-C for continuous power—your choice, your convenience.
EFFORTLESS WIRE FREE SETUP - Pre-paired sensor and receiver for instant, no-fuss installation anywhere.
UNMATCHED 918 FT RANGE FREEDOM - Stay connected across your home or business without missing a beat.
CUSTOM ALERTS FOR EVERY SITUATION - Choose from 36 melodies & 4 volume levels including silent LED 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 both business entry monitoring and elderly care, it offers easy wire-free installation, 36 ringtone options, and adjustable volume up to 113dB. Its smart fall prevention feature accurately detects foot movement to reduce false alarms, making it ideal for dementia and sleepwalking monitoring. Powered by AAA batteries or USB-C, this versatile device ensures you never miss an important alert.

Specifications

ASIN	B077VV8ZJ1
Audible Noise	113 db
Battery Description	Alkaline
Best Sellers Rank	#40,647 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #36 in Door Bells Chimes
Brand	HENDUN
Color	1 Receiver & 1 Transmitters
Compatible Devices	Motion Detector
Control Method	Remote
Customer Reviews	4.4 out of 5 stars 1,479 Reviews
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
Number of Items	1
Power Source	Battery Powered
Product Dimensions	3.94"L x 1.97"W x 2.76"H
Sensor Technology	Motion Sensor
UPC	664248632944
Unit Count	1 Count

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R1088

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered 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 South Africa.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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