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Small Loud Doorbell Speaker Wireless Door Contact Sensor Refrigerator Door Open Alarm

  • 1-9 Pieces
  • 10-50 Pieces
  • 51-200 Pieces
  • >=201 Pieces
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Shipping fee:
Depends on the order quantity.
Lead Time:
5 day(s) after payment received
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Quick Details
Place of Origin:
Guangdong, China
Brand Name:
Model Number:
Microsound V15
door open sensor alarm
Power voltage:
DC5V stabilized voltage supply
Power Supply:
Three AAA 1.5V batteries
Play modes:
loop playback, single track
Two modes:
welcome mode, alarm mode
4MB SPI-flash
Door sensor induction:
door, window, refrigerator, etc.
Voice files:
download from computer
Audio Format:
MP3, bit rate: 8~224Kbps

Packaging & Delivery

Selling Units:
Single item
Single package size: 
14X8X9 cm
Single gross weight:
0.200 kg
Package Type:
Lead Time :
Quantity(Pieces) 1 - 20 >20
Est. Time(days) 5 To be negotiated

Small loud doorbell speaker wireless door contact sensor refrigerator door open alarm

Product Description

This door open sensor alarm device is small and exquisite, easy to carry, beautiful sound. Door magnetic induction, intelligent trigger, no need to operate manually, applied in smart bell, welcome door and other occasions.



Operating guidance


Slide switch 

Power off function: Power off when slide to the bottom

Alarm mode: When slide to the middle, it becomes alarm mode. When door open, play voice all the time. You can long press button B to switch whether alarm voice can be interrupted when close door.

Welcome mode: when slide to the top, it becomes magnetic triggering mode.

Button A

Long press: Red LED flashing once means single cycle mode. Everytime open door, it will play one sound. If door is not closed, stop playing after finishing the sound play.

Long press: Red LED flashing three times means recycled playback. Everytime open door, it will play the next sound. If door is not closed, stop playing after finishing the sound play.

Short press: Play the next sound or choose current sound as the activated sound.

Button B

Long press: Red LED flashing once, switch to trigger with interruption mode. Everytime open door, it will play sound. If close door, triggering can interrupt current sound playing.

Long press: Red LED flashing three times, switch to trigger without interruption mode. Everytime open door, it will play sound. When close door, triggering cannot interrupt current sound playing until its play completed.

Short press: 0-7 volume ranges. 0 is mute.



Product Features
  • Small and exquisite, high quality MP3 voice playback, beautiful sound. 
  • Eight-level volume for option.
  • Door magnetic induction triggers to play voice; induction distance is 2 cm. 
  • Two modes: Welcome mode and alarm mode, alternative(trigger to play the first voice regularly).
  • Standard 32Mbit(Approx. 4MB) SPI-FLASH.
  • A button is to choose the next one and switch between A and B mode; B button is to adjust volume and switch mode between trigger with interruption and trigger without interruption.
  • A mode is all loop play; B mode is single playback. 
  • Power-off memory mode; default mode is B mode, trigger with interruption.
  • Download voice files by USB cable connected to computer.
  • Adopt 3 AAA batteries or USB supply power, choosing only one power supply mode.
  • When download voice, take out the batteries first, then connect with computer to replace voice.
  • Built in 8 ohm 1w speaker. 


Electric Parameter


Power Supply

DC3V-5V, 3 AAA batteries

Working Current

Sleep standby state

Close door (no voice play)


Open door (no voice play)


Playing state


Audio format


Bit rate: 8~224Kbps

Audio output power

8Ω/1W(typical value)

Magnetic Induction Distance


Sound loudness


Related Products
Kingsound V1Smartsound V2Microsound V15Microsound II

Infrared sensor activated

Replace audio files by USB flash disk

Infrared sensor activated

Replace audio files by micro SD card

Door open close sensor alarm

Download MP3 audio from computer

Direction recognition

Infrared sensor activated

Download audio from computer


Wired Call Recording Earphone

No memory card needed

Recordings stored in cellphone automatically

Bluetooth Call Recording Earphone

Built in 512M memory

Recordings stored in earphone


Q1. How long can I get the feedback after we sent the enquiry?

A: We will reply you within 12 hours in working day.


Q2. What is your terms of payment?
A: T/T, Paypal, Western union.

Q3. What is your terms of delivery?


Q4. How about your delivery time?
A: Generally, it will take 2~25 working days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.


Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.


Q6. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but customers have to pay the sample cost and the courier cost.


Q7. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery.


Q8. What is your terms of packing?
A: Generally, we pack our goods in white boxes and brown cartons. If you have legally registered patent, we can pack the goods in your branded boxes after getting your authorization letters. We'll show you the photos of the products and packages.


Q9: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit;
   2. We respect every customer and we sincerely do business no matter where they come from.



About company

Shenzhen Waytronic Electronics Co., Ltd founded in 1999, is a high-tech company specialized in voice  electronic products, focus on voice technology research, intelligent terminal applications, intelligent speech technology  research, human-computer interactive application and design. 


Our company has a professional R&D and production team with researching and self-developing capability. We uphold the concept of "Positive innovation, Pioneering courage, Customer satisfaction, Team cooperation", and strive to build a well-known brand in voice industry.

Welcome your inquires for more details.