1.Pure digital building intercom 2.Use the ADI low power and DSP design 3.saving the electricity 4. reliable and long-lived video outdoor phone Functions 1 video outdoor phone use aluminum casing, with a waterproof, dust-proof, anti-dismantle, shock-proof function;2 video outdoor phone use The metal wire-drawing craft, clear reveals luxury upscale.3 video outdoor phone One-touch calling, simple ...