Built-in microphone, you can hear the voice clearly in 10 meters. Left & right 360 degree and up & down 30 degree rotatable, you can adjust the angle as you like. Imported optical lens, high precision and NO distorted pictures.5. The focal length: 8 cm infinity. Signal-to-noise ratio: More than 48 dB (30 F/s 220 LUX). 2LEDS night vision effect is better, is controlled by a Line switch , use more convenient, fast.
