User's Manual

Item Specification Remark
Storage Time
i
Maximum 6 months @ charge ≥ 40%
Do not store battery packs
for a long time with less than
40% charge level.
i. It is recommended that the battery shall not be stored in the device if the device is not going to be used within 6 month. If the battery is remove,
the battery will not be drained as quickly as stored in the device,
D4 Eye Tracker
Technical Specifications
Tobii IS5 Module
Working Distance 45 — 85 cm
18 — 33 inches
Freedom of Head Movement
1
@ 70 cm / 27.5 inches
(Width x Height)
35 × 30 cm
13.8 × 11.8 in
Positioning
Distance (from screen) 45 — 85 cm
17.7 — 33.5 in
Track box size (Width × Height) 20 × 15 — 35 × 30 cm
7.9 × 5.9 — 13.8 × 11.8 in
Track box depth 40 cm
15.7 in
Gaze Data Rate 33 Hz
User Calibration
(former tracking robustness)
>99%
Detect Gaze
Interaction >30Hz 90% for 95% of population
2
Raw data max frame rate 90% for 95% of population
2
Gaze Accuracy
Across 95% of population
2
<1.76°
Gaze Precision
Across 95% of population
2
<1.07°
Max Head Movement Speed
Eye Position 40 cm/s (15.7 in/s)
Gaze Data 10 cm/s (3.9 in/s)
Max Head Tilt 25°
Max Yaw, pitch
25°
Visibility
Flicker
Data Flow and Data Rate
Gaze Latency
17 ms
Gaze Recovery
50 ms
Mounting
Built-in
Power Supply
Built-in
Tobii Dynavox I-Series User’s manual v. - en-US
Appendix D Technical Specifications
53