... phone system, indoor video door phone, (door phone,video phone, video indoor phone), video door phone (indoor unit), (video door phone, color ... phone), indoor video door phone with free hand, video intercom/video door phone/video door entry indoor monitor, indoor video phone, video door phone ... working, max 9W, holding, 130mW.3.Environmental temperature:-30°C-55°C.4.Power output:≥5mW. 5.Degree of ...