A popular consumer format in Europe, the Video 2000 machine allowed users to turn the tape over and play both sides, for a recording time of up to eight hours. The machine used a system of automatic tracking: its Dynamic Track Following system, ensuring that the tracking was always 100% perfect, even on still pause and picture-search modes. It achieved this by having the video heads mounted on piezoelectric actuators that followed the tracks as they were scanned. There was a second generation of Video 2000 machines before the format was discontinued, including a portable battery-operated machine that was considerably smaller and lighter.