Baby Cry Transmitter
The Bellman Visit Baby-Cry Transmitter helps you notice when your baby is crying. It is wireless and extremely easy to use. Simply place it standing up near the baby. The Baby-Cry Transmitter is activated by crying or screaming and sends a radio signal to the Bellman Visit receiver(s) for alerting. The transmitter can be adjusted in several ways to fine tune how sensitive the detection should be. Powered by two 1.5 volt LR14 Voltage batteries; battery life is approximately 1 year.
More information: http://www.independentliving.com/prodinfo.asp?number=BEL118