Sonic Alert Baby Cry Transmitter BC400

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The wireless BC400 Baby Cry Transmitter is a small unit that immediately alerts you when your baby starts crying by sending a signal to a Sonic Alert receiver. At least one Sonic Alert remote receiver needs to be used with the BC400 transmitter.

A sensitivity knob lets you adjust how sensitive the BC400 transmitter should be to detect your baby's cries, depending on where you place the unit. The BC400 does not have any cords - simply plug it into a wall outlet - so you can place it near your baby without them grabbing on wires.


  • Adjustable sensitivity control can be set to alert you to sounds as soft as a baby's whisper
  • Plugs into any electrical outlet in the baby's room
  • No lamp flashes in the baby's room
  • Built-in indicator light shows you that it is working
  • No built-in outlet to plug in a lamp

Add more lamps to flash in other rooms by plugging in the wireless SA201 Deluxe Remote Receiver


Add extra loud adjustable audio in other rooms by plugging in the wireless RH-100 Sonic Siren Loud Audio Receiver.