... phone 1.unlocking,handsfree.night vision 2.support 4CH video in, 1CH video out 3.high resolution and contrast ratio4.rainproof,touch ... , low consumption and high resolution 5. Monitor, intercom, unlock, hand-free and multi-melody.6. Able to connect with 2 electronic ... hours. 7" TFT-LCD touch key wired video door phone,supporting 4CH video in,1CH video out.night vision.control 2 electric lock