Swann's DVR4-2500 features the industry's latest H.264 recording technology that uses less hard drive capacity and allows for faster playback. The DVR4-2500 records to a 500GB hard drive capable of continuous recording for up to 30 days, in addition to a USB port that enables hassle-free video backup on a USB flash drive. The system also connects to the web, allowing users to view live and recorded surveillance footage over the internet, via their web-enabled smart phone, including the iPhone, or a PC.