... 1.IR night vision 2.clear voice for intercom 3.stable quality Product name: Touch screen 3.5" wireless Video Door Phone ... inch display screen,touch button2,Video intercom,unlocking,monitor functions3,Intercome between inner monitors4,Infared night vision5, Waterproof outer camera6, support 8G ... (2) Hands-free intercom,clear voice.(3) calling button for begin to work, standby state to save power.(4) 83 ...