Secrui M508 Wireless Door Open Chime
- Maximum Range: 396.24 feet
- Power Source: Battery
- Mounting Type: Door Mount
- Battery Description: AAA
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A sensible door-open alert for child or dementia safety and simple store entries, with 58 tunes and a silent LED option, though it's new enough on this listing that real-world durability isn't confirmed by buyers yet.
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ASIN: B07HSLB3BLModel: M508+D017Category: Doorbell Chimes
Overview
Mount this on a door frame and it rings the moment that door opens, no button required, aimed at store entries and at watching over kids, toddlers or a family member with dementia. One sensor and receiver are included, rated to 500 feet apart.
Rather than a button someone presses on purpose, this is an open/close sensor: it fires the moment the door itself moves, which is the point for tracking a toddler who wanders off or an elderly parent heading out unnoticed. Five volume steps run from 0 to 110dB, and even at mute the receiver still flashes a colored LED, so a caregiver in the next room can still catch it silently. The sensor and receiver arrive pre-paired, and mount with either 3M tape or screws.
- 1 sensor + 1 receiver, 500ft rated range
- 58 chime melodies
- 5 volume levels, 0-110dB, with mute LED indicator
- Expandable to additional sensors per receiver
Who it's for
Parents or caregivers who need to know the instant a specific door opens, plus small businesses wanting an entry alert without wiring. Less suited to anyone who wants a doorbell tied to a push button rather than the door itself.
Pros and cons
- Triggers on the door opening itself, no button needed
- 58 melodies and 5 volume levels including a silent LED mode
- Pre-paired out of the box, mounts with tape or screws
- Expandable to more sensors on other doors
- Tape or screw mounting is more visible than a flush sensor
Performance notes
The sensor mounts on the door frame and detects the door's own movement rather than requiring a button press, sending a signal to the receiver up to 500 feet away; the receiver then plays one of 58 chime melodies at one of 5 volume levels between 0 and 110dB, with a colored LED that stays visible even when the volume is set to mute.
Specifications
| Brand | Secrui |
|---|---|
| Model | M508+D017 |
| Dimensions & fit | |
| Size | 1 Receiver+1 Sensor |
| Capacity & performance | |
| Maximum Range | 396.24 feet |
| Audible Noise | 120 db |
| Power & efficiency | |
| Power Source | Battery |
| Battery Description | AAA |
| Voltage | 120 volts |
| Construction & materials | |
| Color | White |
| Compatibility & installation | |
| Mounting Type | Door Mount |
| Compatible Devices | Motion Detector |
| Included components | |
| Unit Count | 2 |
| Other details | |
| Sensor Technology | Contact Sensor |
| Control Type | App, Touch |
| Shape | Ellipse |
| Number Of Batteries | 1 AAA batteries required. |
| Number Of Items | 1 |
| Mfr Part Number | SB-123 |
| Builtin Media | 1 × Sensor(battery Included), 1 × Plug-In receiver,2 × Adhesive Tape, 2 × Screw, 2 × Anchor, 1 × User Manual |
| Item Highlight | 1-Sensor + 1-Receiver With 500FT Range/58 Chimes/5-Volume Level, Bedroom Entry Alert For Kids/Toddler/Dementia/Elderly Safety |
Frequently asked questions
Does the Secrui door chime need a button pressed to trigger?
No, it's a door-open sensor that fires when the monitored door itself opens, not a push-button doorbell.
Can it stay silent but still alert visually?
Yes, at the 0dB mute setting the receiver's colored LED still flashes so you get a visual alert.
How far apart can the sensor and receiver be?
The listing rates the range at up to 500 feet between sensor and receiver.