Here's what other sites are saying:
The Pieps Backup Transmitter is there for when you need added safety. This Backup transmitter is worn along with your other beacon just in case your main beacon is separated from you.
This isn't an avalanche beacon. It's a nice compliment to your existing beacon, and turns on automatically when separated from your main beacon.
Black Diamond PIEPS Backup Avalanche Transmitter - Black Diamond PIEPS Backup Avalanche Rescue Transmitter, lightweight, durable, and worn directly on your body. The PIEPS Backup Avalanche Transmitter transits only in an emergency and automatically goes into transmit mode when separated from your main beacon by more than one meter!
PIEPS Avalanche Beacons Backup Transmitter PP1098790000ALL1. Remember when the unthinkable happens the PIEPS Backup Avalanche Transmitter is there to save your skin.
Features of the Black Diamond PIEPS Backup Transmitter Compatible with any standard (457 kHz) beacon on the market Accelerometer keeps Backup from transmitting when still in motion 1 Alkaline AAA battery IEC-LR03, 1.5V
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