BellNorth 2.4 GHz Wireless Video Door Bell Intercom System. Long Life Battery. Ultra Portable. Compatible Uses Include: Home, RV, Worksite, Cabin. Lightweight and easy to mount (includes step by step instructions) Extra wide range of vision lets you view visitor/s from a distance High-resolution camera: 300,000 pixels displays clear images Records "Missed Visits" so you know if you missed anyone important. Standby time: 300 hours