Signature Series Sound Monitor 418 MHz Transmitter (SM5-SS)

Summary

AI-generated from vendor-published content · April 26, 2026

This battery-powered microphone transmitter listens for sounds in a room — a baby crying, a timer going off, a doorbell, or an alarm — and wirelessly sends a signal to a compatible Silent Call Signature Series receiver, which then alerts the user through flashing lights or vibration. It's designed for people who are deaf or hard of hearing and can't rely on hearing ambient sounds around the home. The transmitter itself is just one piece of a larger alerting system — you'll need at least one Silent Call Signature Series 418 MHz receiver (sold separately) to actually get the alert. Before buying, note that this only works within the Silent Call Signature Series ecosystem, so it won't pair with receivers from other brands or older Silent Call product lines.

What Setup Looks Like

• Out of the box
  
  1. Install the included AA batteries and place the transmitter near the sound source (crib, oven, door).
  2. Adjust the sensitivity dial to pick up the sounds you need without triggering false alarms.
• With a guide
  
  1. Pair the transmitter with your Silent Call Signature Series receiver following the channel-pairing steps in the included product manual.
  2. Test by making the target sound and confirming the receiver alerts — adjust sensitivity as needed. Allow 15–30 minutes total. See manufacturer support resources for detailed instructions.

Where to Get It

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