... 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 ... piece Video resistance somePower supply(adapter)1 piece Screw driver 1 pieceDoor station bracket(VI)1 piece Expansion plug ...