The QT4744115 DVR bundle gets the security job done with industry-standard H.264 video compression, two audio channels, recording and search options, easy backup and remote monitoring. CIF recording resolution gives you a standard high quality image and your files can be easily viewed with the included player. It operates with Windows XP, Windows Vista, and Windows 7 operating systems and select 3G/ 4G smartphones can deliver key details from your DVR. Receive email notifications, view your camera feeds and see exactly what’s happening while using your iPad, iPhone, BlackBerry,Windows Phone 7, or Android phones. This system includes 4, easy-to-install, weatherproof cameras, each capable of up to 40 feet of night vision and 400 TV lines of Resolution. Each camera also comes equipped with a 60 foot standard cable that minimizes signal interference for better quality images. All Q-See DVRs support worldwide remote monitoring and perform well with home or business computer networks and a variety of security cameras Rely on Q-See to save you money, and with competitive prices, strong warranties, easy installation, and lifetime technical support. Peace of Mind - Anywhere, Anytime.