... door phone/entry/bell system,access control,door station/unit/camera,indoor phone/monitor,security product,video intercom. JB-304 VILLA ... INTERCOM SYSTEMNameDoor phone system,access control,door station/camera,indoor phone/monitor,security product,video intercom.Features DIY system ... piece Screw some4 wires cable(10meters)1 piece User's manual 1 piece