Features* It will ring when visitors press the outdoor unit.*  2.8'' TFT screen with low power consumption,Website:://.anessbreaker.com, no radiation and high definition.*  Auto-display visitors' images on the screen for 10 seconds.*  Auto-recording visitors' images for further tracing even when the owner is out of home.*  Monitoring outside function.*  See visitors' images easily from screen instead of traditional peep-hone viewer with eye closed   to door.*  No cabling trouble.*  No power consumption in standby mode.*  Used of 4 AA batteriesProduct specifications:. Size: 14.6 (W) *9.0 (H) *2.0 (D) cm. Suitable for door 35-105mm suitable for aperture 14-15mm.Accessories: base (Flange Base), DIY (Tool Tightening), peep hole parts (PeepHole, Barrel