VTech DM1211 Audio Baby Monitor

Sound alone is all many parents need once the newborn weeks pass, and this closed audio monitor does it well. It reached over 170 feet through seven walls in testing, the parent units run on battery or plug in, and a color light bar shows the noise level, so you can turn the volume down and still see a cry. Two parent units come in the box, one for the bedroom and one for wherever you are. The nursery unit must stay plugged in, and low tones distort a little. Its $77 list price buys range you can trust without a camera in the room.