-doorbell& camera -2.8-inch high definition screen TFT-LCD -camera:300K Pixel,4X digital zoom,105degree -3pcs AAA batteries ... door bell 1.Wireless ,easy installation 2.Clear image in LCD Panel on door 3. Indoor and outdoor intercom; 4 viewer ... ;* Indoor active surveillance, indoor and outdoor intercom;* Clear image in LCD Panel on door, easy to see for people of any ...