--- product_id: 313939218 title: "HENDUN Motion Sensor Doorbell , Bed Alarms for Elderly Dementia Patients , Do..." brand: "hendun" price: "$63.91" currency: USD in_stock: true reviews_count: 5 category: "Hendun" url: https://www.desertcart.us/products/313939218-hendun-motion-sensor-doorbell-bed-alarms-for-elderly-dementia-patients store_origin: US region: United States of America --- # 4-stage adjustable volume & light 918ft wireless range 36 ringtone options HENDUN Motion Sensor Doorbell , Bed Alarms for Elderly Dementia Patients , Do... **Brand:** hendun **Price:** $63.91 **Availability:** ✅ In Stock ## Summary > 🔔 Stay ahead of the unexpected—security that welcomes, warns, and works for you. ## Quick Answers - **What is this?** HENDUN Motion Sensor Doorbell , Bed Alarms for Elderly Dementia Patients , Do... by hendun - **How much does it cost?** $63.91 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/313939218-hendun-motion-sensor-doorbell-bed-alarms-for-elderly-dementia-patients) ## Best For - hendun enthusiasts ## Why This Product - Trusted hendun brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Power That Lasts:** Dual battery & USB power with up to 7 months runtime—reliable security without constant charging. - • **Customizable Alerts:** Choose from 36 ringtones and 5 welcome songs to match your vibe or business style. - • **Multi-Use Smart Sensor:** From dementia care to pet monitoring and retail greetings—one device, endless peace of mind. - • **Extended Detection Range:** Infrared sensor covers up to 26ft, keeping loved ones and property safe from afar. - • **Effortless Wireless Setup:** Install in minutes—no wires, no hassle, just instant security. ## Overview The HENDUN Motion Sensor Doorbell is a versatile, wire-free security and alert system featuring a 918ft wireless transmission range, 36 customizable ringtones, and an infrared detection range up to 26ft. Designed for easy installation and multi-purpose use, it supports adjustable volume and colorful LED alerts, making it ideal for elderly care, retail, home security, and pet monitoring. Powered by batteries or USB, it offers up to 7 months of reliable operation, ensuring continuous protection and convenience. ## Description Walk Through PIR Motion Activated:Welcome the guest/customer/visitor in the daytime, anti thief at night, prevent the loss of wandering dementia patients, noisemaker welcome/door sensor/motion detector/color light, etc. Five memories, the store owner's secret assistant. - Remote transmission, 280m in open place, suitable for more places. - 8 chord music chips, 40mm large horn, more comfortable, louder. Colourful LED lights, brightness can be adjusted, different colours to distinguish different inputs and smarter - independent alarm horn, maximum 113 dB, can effectively deter thieves. - Volume can be adjusted, have memory function when changing batteries, more considerate and comfortable. - Can learn a maximum of 32 infrared, vibration, magnetic etc. wireless sensor accessories and 8 remote controls. - Applicable to all kinds of shops, shop owners, entry alarm bell for shop, hotels, offices, factories, homes, shops, garage, supermarket, boutique, villas and so on. Application:split welcome doorbell, sleepwalker alarm, family doorbell, anti-theft, garage anti-theft, induction doorbell, mailbox game, sensor light and colorful lights, sensor detector, doorbell, induction doorbell, greeter care secret, Alzheimer's door alarm and so on. The receiver host can learn a maximum of 32 infrared curtains to detect different entrances with its color light. the entrances! Electrical Instructions: Receiver host with 3 5 (AA) alkaline batteries or micro USB supply current (all not included). Infrared curtain with 3 7 (AAA) alkaline batteries or micro USB power supply (all not included). Receiver host battery can use 5 to 7 months (ring 30 times a day). Infrared curtain battery can be used for 5 ~ 7 months (detect 30 times a day). Note: receivers can only be used indoors. The body proximity detector should be installed in a position to prevent direct sunlight and rain. KS-SF20R wireless welcome doorbell alarm system RV alarm system car motorcycle alarm system doorbell motion sensor light barrier with alarm bell door open bell Review: C’est fiable et prévient le vol près des portes d’entrées. Il est en fonction depuis 2 1/2 ans sans problème. Nous avons branché le tout sur ports USB. Très fiable. Je recommande Review: Used this to keep to train a cat where not to be (switched the Greeting to Chinese from hellish sounds more nosier and is loud at at full volume. If I am around and hear the alarm I also say GET! sternly. The first two weeks they tested it several times first 3 or 4 days then about Once every two days after two or three weeks. 3 months later they understand the perimeter that will set it off and may walk up to the edge. If I had to Guess they are trying to think how to defeat it momentarily and walk away. Best gadget Repurpose Ever. ## Features - EASY, FAST, WIRE FREE INSTALLATION sensor detects motion and sends a signal to the receiver. - SELECTABLE RINGTONES the receiver is a doorbell design with 36 different ringtones from melody sounds to simple basic buzzfor personal preferences and 5 welcome songs for retail business use. - WIDE RANGE The transmission range of the driveway alarm is up to 918ft (the distance from the detector to the receiver) and detection range of the infrared sensor approximately 13-26ft to keep you informed and safe. You can put the motion sensor detector at the room of alzheimers sleepwalking elderly and put the receiver in your house. - MULTIPURPOSE motion activated sensor chime, door alarm,mailbox alert,retail business welcome doorbell,cordless fall and Wander pet cat dog monitor alarm. - Adjustable Volume and Light Mode 4 STAGES ADJUSTABLE VOLUME (Loud/High/Middle/Low ) 113-25dB. Batteries and USB dual power supply. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B077VV8ZJ1 | | ASIN | B077VV8ZJ1 | | Audible Noise | 105 Decibels | | Battery Description | Alkaline | | Best Sellers Rank | #100,930 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #108 in Door Bells Chimes | | Brand | HENDUN | | Color | Black | | Compatible Devices | Motion Detector | | Control Method | Remote | | Customer Reviews | 4.4 4.4 out of 5 stars (1,698) | | Customer reviews | 4.4 4.4 out of 5 stars (1,698) | | Date First Available | 24 February 2018 | | Is Discontinued By Manufacturer | No | | Item Dimensions L x W x H | 10L x 5W x 7H centimeters | | Item Weight | 200 g | | Item model number | 43239-217649 | | Manufacturer | HENDUN | | Manufacturer | HENDUN | | Maximum Range | 25.92 Feet | | Mfr Part Number | 43239-217649 | | Model Number | 43239-217649 | | Mounting Type | Wall Mount | | Power Source | Battery Powered | | Product Dimensions | 10.01 x 5 x 7.01 cm; 199.58 g | | Sensor Technology | Photoelectric Sensor | | Smart Home Compatibility | Not Smart Home Compatible | | UPC | 664248632944 | ## Product Details - **Brand:** HENDUN - **Colour:** Black - **Compatible devices:** Motion Detector - **Power source:** Battery Powered - **Product dimensions:** 10L x 5W x 7H centimeters ## Images ![HENDUN Motion Sensor Doorbell , Bed Alarms for Elderly Dementia Patients , Do... - Image 1](https://m.media-amazon.com/images/I/51zLfQyHVVL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: how do you sinc two receivers to one sensor?** A: 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. **Q: Can i use power bank as power source?** A: 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). **Q: how do i buy the remote controller ?** A: You can buy this https://www.amazon.com/dp/B01HUS7RP0/ref=sr_1_1?ie=UTF8&qid=1529542599&sr=8-1&keywords=B01HUS7RP0 **Q: Does the wind cause this to ring?** A: Thank you for your attention to HENDUN motion sensor doorbell. The wind will not cause the ringing. Thanks again. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by R***. on 12 September 2025* C’est fiable et prévient le vol près des portes d’entrées. Il est en fonction depuis 2 1/2 ans sans problème. Nous avons branché le tout sur ports USB. Très fiable. Je recommande ### ⭐⭐⭐⭐⭐ Review *by A***T on 3 December 2025* Used this to keep to train a cat where not to be (switched the Greeting to Chinese from hellish sounds more nosier and is loud at at full volume. If I am around and hear the alarm I also say GET! sternly. The first two weeks they tested it several times first 3 or 4 days then about Once every two days after two or three weeks. 3 months later they understand the perimeter that will set it off and may walk up to the edge. If I had to Guess they are trying to think how to defeat it momentarily and walk away. Best gadget Repurpose Ever. ### ⭐⭐⭐⭐⭐ Review *by T***I on 3 April 2025* Facile a placer ## Frequently Bought Together - HENDUN Motion Sensor Doorbell , Door Chime for Business, Store Welcome Buzzer Monitor, Commercial Door Entry Alert,Motion Detector Alarm, Caregiver Reminder for Elderly, Visitor Bell Dinger - Wireless Motion Sensor Door Chime: Business Entry Doorbell Indoor Motion Detector Buzzer (500Ft Range, 32 Tunes, 5 Level Volume) Store Entrance Alert Bell Bed Alarm for Elderly Dementia Patients - Door Chime, Satisure Wireless Door Open Contact Sensor Alarm Chime with 600 FT Range 58 Chimes 5 Volume Levels LED Indicators, Door Ringer Alert for Business/Store/Home/Office When Entering --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/313939218-hendun-motion-sensor-doorbell-bed-alarms-for-elderly-dementia-patients](https://www.desertcart.us/products/313939218-hendun-motion-sensor-doorbell-bed-alarms-for-elderly-dementia-patients) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-12*