... Intercom, Video Intercom Door Phone. video indoor phone, indoor phone, indoor phone system, indoor video door phone, (door phone, ... phone for indoor unit,color indoor phone, intercom system indoor phone, color video indoor phone, digital indoor phone, color indoor phone for ... indoor unit Features:1.4-inch CRT. 2.Power consumption: working, max 9W, holding, 130mW.3.Environmental temperature:-30°C-55°C ...