NaturalPoint NAT-TIR5PRO TrackIR 5 6DOF Head Tracker Specifications: Raw Sensor Resolution: 640 x 480 Reporting Resolution: 96,000 x 72,000 Resolution/Horizontal Degree: 1850 subpixels/degree Sample Rate: 120 fps Weight: 1.8 oz Response Time: 9 ms Connection: USB Cable Length: 6 ft System Requirement: 1 GHz processor USB 1.1 or 2.0 port Windows XP or Vista Range 2 to 5 ft (61 cm to 152 cm) Dimension: 2 x 1.5 x 0.57 (without base) Weight: 0.11 lb.