The Hikvision DS-KD-IN is a video intercom indicator module and is part of the 2nd generation of video intercom systems. With dimensions of 98.5mm(L)×100mm(W)×33.7mm(H), IP65 weather-proof housing and a working temperature of -40°C to 60°C, this is great for outdoor use, its not too big but its not too small. It can be installed by flush mounting or surface mounting, and is powered by DS-KD8003-IME1, by 12V DC using a maximum of 2W.