... display screen IR night vision clear voice for intercom stable quality 3.5"inch wireless video door phone DH-2358MA11simply ... features:1,Wireless Video door phone,3.5 inch display screen,touch button2,Video intercom,unlocking,monitor functions3,Intercome between ... frequency hopping and encryption technology, (2) Hands-free intercom,clear voice.(3) calling button for begin to work, standby state to ...