... 3.External dimension:316*130 locklocks-ZC9 video door phone CCD is calling management center and talk, remotely unlock by management ... outdoor phone, intercom system outdoor phone, color video outdoor phone, digital outdoor phone, color outdoor phone for apartment, B/W handfree ... Convenient night use with keyboard lamp.5.Video outdoor phone CCD, with automatic IR for night view.6.Unlocking with password ...