... charger with longer power-on time, standby time and life2, Anti-theft alarm function3, OSD menu and time display function 4, Backlighting ... . (120 degree for option)9,Installation:Fit to 10-100mm door thickness,φ14-φ40mm hole diameter. 10,Indoor unit outlet dimension ... . 11,Outdoor unit outlet dimension: φ50*12MM. 2 inch digital anti-theft peephole