... door phone, SAVN1-7W (1)7"TFT LED ; (2)Hand free ,unlock; (3)FCC approved door phone,video door phone,color video ... Vandalproof;(2)7"TFT LED ;(3)Hand free ,unlock;(4)FCC approved ;SAV-N1-7WHand-free ;waterproof and vandalproof Function:Visitor calling, ... video intercom, unlock, monitor. Two monitor to one camera ...