PRODUCT DESCRIPTION Hear your child even when you're in another room, and rest assured you'll know when they need you with the DM111 audio baby monitor. Totally digital transmission cuts down on annoying static and feedback from other wireless devices, so the only sounds you'll hear are your baby's. The VTech Digital Audio Monitor - DM111 Features: Digital Wireless Transmission eliminates background noise, so you can rest assured the only sounds you - and only you - will hear are your baby's.; 5-Level Sound Indicator - LED lights on the parent unit indicate the level of sound in your baby's room so you can visually monitor the noise level with the unit muted.; Belt Clip - Clip the parent unit to your belt and take advantage of the extended range and battery-powered operation.; Out of range indicator; High sensitivity microphone. MANUFACTURER CONTACT INFORMATION Customer support number - 1-800-595-9511