* 2.4ghz wireless dvr; * usb/av outlet can be connected to pc and tv; * high definition:640*480pixel; * support auto motion detection and recording; * support 4-ch and 1 av input; * wireless and wired are working simultaneously in pip (picture-in-picture); * support auto scan function; * support max 16gb sd card ( updated ); * 380tv line 1/3 color cmos camera. * built-in infra-red led (18x) * mini size at low price; * suitable for family, school, shop, office, car, important entrance and exit