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Sensor Type
LED Feedback
Lighting Control
Ease of Installation
Beginner (Installs < 10 minutes)
Sonic Alert
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Alerts You When Your Baby Starts Crying
Sonic Alert BC400 Sonic Sitter Baby Cry Sound Signaler
Sonic Alert BC400 Sonic Sitter Baby Cry Sound Signaler
Sonic Alert BC400 Sonic Sitter Baby Cry Sound Signaler
Item# 52372
Price: Normally $43.95 
Hot Deal $36.33
Free shipping on orders over $50 - See Details


  • Simple plug in sensor detects baby's crying
  • Lamp flashes to notify you when sound is detected (receiver unit available separately)
  • Easy installation and operation
  • Sensitivity control

Essential Info

The Sonic Sitter, model BC 400 is a small, attractive unit that immediately alerts you when your baby starts crying. The BC 400 has an adjustable sensitivity control, and can be set to alert you to sounds as soft as a baby’s whisper.

The BC 400 simply plugs into any outlet in the baby’s room. So your baby is not disturbed, no lamp flashes in the baby’s room. When your baby cries, the BC 400 sends a signal over your home’s electrical system to remote receivers, so it is completely wireless! You can rest assured that you will always know when your baby is crying and needs you. The Sonic Sitter also has a built-in indicator light to show you it’s working.

Please remember you need to use at least one remote receiver with the Sonic Sitter. The BC400 can be used to signal:


Important notes:
Only merchandise credit for defective items returned within 30 days of purchase. No other returns allowed on this item.


6 Ratings
5 star: 67%  (4)
4 star: 17%  (1)
3 star: 0%  (0)
2 star: 17%  (1)
1 star: 0%  (0)
Average Customer Rating
(6 customer ratings)
Share your thoughts with other customers
STEVEN -- owings mills, MD   6/13/2013
Nice quick transaction. No issues. :D
SARA -- rochester, NY   9/3/2012
works great with my sonic alert boom alarm, very sensitive to sounds which is adjustable to many sound levels
MARENE -- vancouver, WA   8/9/2012
Love it. It works so much better than my "dinosaur" baby cry signaler. It burned so I had to order this one. I like the fact that it does not alert me each time the fan is turned on. It alerts me when my baby cries.

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