Comparison Chart - EyeTech Digital Systems

Specification	VT2 Mini	VT2	VT2 XL	VT1
Ideal for	Laptops, small monitors	Large monitors, high speed	Very large monitors, long distance, high speed	Large monitors
Connection type	USB 2.0			FireWire/IEEE 1394a
Dimensions	11.4 x 0.8 x 1 in (29 x 2 x 2.5 cm)	19.7 x 2.4 x 2.8 in (50 x 6 x 7 cm)	37.8 x 2.4 x 2.8 in (96 x 6 x 7 cm)	19.7 x 2.4 x 2.8 in (50 x 6 x 7 cm)
Typical operating distance	25.6 in (65 cm)	25.6–39.4 in (65–100 cm)	47–98 in (120–250 cm)	25.6–39.4 in (65–100 cm)
Head motion at typical operating distance (horizontal x distance)	13 x 13.8 in (33 X 35 cm)	13 x 15.8 in (33 X 40 cm)	12.6 x 21.7 in (32 X 55 cm)	11.4 x 13.8 in (29 x 35 cm)
Accuracy	0.5°
Method	Dark pupil, single or binocular tracking
Weight	0.5 lbs (0.2 kg)	3 lbs (1.4 kg)	4.5 lbs (2 kg)	3 lbs (1.4 kg)
Certification	CE and EMC
Standard data rate	80+ FPS			55 FPS
Power draw	2.5 W (1 USB) 5 W (2 USB)	2.5 W (1 USB) 4 W (2 USB)	12 W	8 W
Power supply	USB port		AC Adapter
Monitor size	Up to 19 in (48 cm)	Up to 30 in (76 cm)	Up to 50 in (127 cm)	Up to 30 in (76 cm)
Calibration	1, 5, 9, or 16 point calibration

VT2 Mini