The Sony 900MHz BabyCall Nursery Monitor is desigend to let you enjoy peace of mind when you are away from your loved one. It uses the clearest channel giving you a crisper and clearer audio of all your baby's actions. This monitor will keep you well informed of all your baby's actions and activities with the reliable 5 Sound Sensor. Going to the opposite end of the house? No need to worry! The Out of Range Indicator will beep and light up indicating that you have gone to far. The handy belt clip allows you to move around freely without the hassle of having to hold the monitor.