Wireless Pan & Tilt Network IP Camera Wide Angle 3.6mm lens with Two Way audio and night version 16 IR Infrared LEDs for night vision covers a 30-foot area Easy Installation in minutes 15 preset Positions, Two way audio hear and be heard.Built-in microphone and speaker Supports VLC mode. Browser: IE 6.0/ 7.0/ 8.0, Firefox, Safari, Google Chrome, etc. Supports Gmail/Hotmail and MSN functions.Free DDNS for remote viewing Note : If use two way audio by smart phone , please download app