4 Bell Multi-Villa Outdoor Unit
4 Door Bell Outdoor Unit
4 Wires System, easy Installation
Hand free, Visitor Calling, Video Intercom, Unlock, Monitor
Support up to 4 Indoor Monitors
Nano glass shield camera with Aluminium Alloy Panel
1/3″ CMOS Camera with 480 TVL Resolution
IR Color Camera, Night Vision
Weather/Vandal-proof Outdoor Unit