4" Videointercom of ZHero series, ZHeroS model, suitable for 4+1 reduced wiring with electronic call systems. Ideal even for complex estates with high number of users and thanks to the essential and top quality design, it is suitable to any environment. Very thin and surface mounting. Icons for door open and bell exclusion notification. 2 buttons for answering and door lock release; 2 buttons for monitoring function to main or additional external door station activation or dry contact. Additional functions to be properly wired. Intercommunicating service is not available.