The VTech DM221 baby monitor provides a lot of bang for your buck. The parent unit can operate up to 1,000 feet outdoors and 160 feet indoors. The monitor provides clear sound eliminating any white noise and the 5-level sound indicator indicates the noise levels in your baby’s room. You can also talk to your baby through the two-way intercom. The rechargeable batteries will allow you to use the parent unit for up to 18 hours on a single charge.