Technical specificationsPCEye Plus
Gaze Data Rate 60 Hz
Data Streams Eye tracking (gaze point, eye position, etc.)
IR image stream at 30 fps
Power Consumption
(Full Operation)
1.5 typical average
Processing Unit Tobii EyeChip™ with fully embedded processing
Interface USB 2.01 (power and signal)
Head movement box2 size at 90 distance >40 cm × 35 cm ellipse
Distance from user to the Eye Tracker 50 cm - 95 cm
20″ - 37″
Screen Size3
(at 65 cm (25.6") user distance)
Recommended up to 27"
Detected Gaze Interaction >30 Hz  99% for 95% of population4
User Calibration
(former tracking robustness)
Max Head Movement Speed Eye Position 40 cm/s (15.7 in/s)
Max Head Tilt >20°
Max Yaw, pitch 25°
Visibility Low visibility (850 nm)
Flicker No flicker (30 Hz constant)
Gaze Latency / Gaze Recovery  25 ms / 100 ms
Unit Size (Length × Height × Depth) 322 mm × 22 mm × 18 mm
12.7″ × 0.87″ × 0.71″
Unit Weight 280 g
9.9 oz
Works with (Operating System) Windows 7, 64 bit
Windows 8.1
Windows 10
System Requirements CPU: 2 GHz, Dual-Core (recommended minimum)
RAM: 4 GB (recommended minimum)
Microphone Microphone array consisting of 4 microphones
Microsoft Cortana certified
Ports 1 × 3.5 mm Switch connector interface

1 USB2 requirements: USB 2.0 BC1.2 provides Tobii IS4 with sufficient power and signal bandwidth.

2 Head box describes the space in front of the eye tracker where the user must have at least one eye to get gaze data. The eye tracker is at a 20° angle looking upward from below the screen.

3For larger than recommended screens, the limiting parameter is the quality of the gaze accuracy at the upper corners of the screen when the user sits close to the screen.

4The degree-of-accuracy and precision over percentage-of-population numbers result from extensive testing across representatives of the whole population. We have made use of hundreds of thousands of diagnostic images and performed tests on approximately 800 individuals with different conditions, vision, ethnicities, everyday dust, smudges or blemishes around their eyes, with eyes out of focus, etc. This has resulted in a much more robust and high performance eye tracking experience and a much more realistic representation of true performance across the whole population, not just in a mathematically "ideal" scenario.

5The "ideal" degree numbers are the previous standard of measuring accuracy and precision, both previously from Tobii and presently from all eye tracking competitors. Though "ideal" numbers are useful to get a general feel about comparative quality and performance, they are not applicable to real world usage in the same way as quantitative degree-of-accuracy and precision over percentage-of-population numbers based on extensive testing across representatives of the whole population.

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