Sony"s NTM-900 900 MHz BabyCall® Nursery Monitor keeps you connected to your baby"s needs. Features include 900 MHz Technology which extends the range of the BabyCall Monitor further than conventional (43-49MHz) monitors, 9 Channels to minimize interference for clearer communication, a Water Resistant* Receiver, AC/DC Operation, and Voice Activation Mode. The BabyCall 5 Sound-Sensor™ Activity Lights alert you when your baby is making sounds, if the receiver is out of range, and when the battery is low; the Out of Range Indicator beeps and lights up when the unit is out of range. Use the Belt Clip to move about the house as you stay tuned to your baby"s needs. The NTM-900 -- a great choice for your family. Make the BabyCall Connection.