Features: 72 Hour Battery Life in PEEP mode: Energy Efficient Picture sets your monitor screen to "sleep" when there is no sound in the nursery. The second baby makes a peep, the monitor activates. 8 invisible infrared LED camera casts watchful eye over child up to 12ft away in complete darkness without harsh red LED. Unbreakable ClearVu Digital Signal provides you the outstanding precision & clarity of a private, secure & interference-free digital signal from up to 500ft away. When combined with 2.4" screen & display rate of 25 frames per second, you'll see & hear baby almost anywhere on your property. Talk to Baby Two-way Communication: Soothe your child with the sound of your voice before you even enter the room Easy Adjustable Wall Mount: Each camera can be adjusted 240 degrees horizontally & 65 degrees Expandable up to 4 Cameras: Add up to 3 additional cameras to conveniently view up to 4 areas of your home on one monitor. LED Volume Indicator: Typical room ambience displays green, while noise or cries from your baby change from yellow through orange and red depending on volume. Lifetime Live Customer Support: Our customer support team can be reached by phone, email & live web chat.