Tobii CDot Tracker – Wireless head tracker Size: 119.6 x 25.1 x 54.4 mm / 4.7 x 2.9 x 2.1" Weight: 160 g / 5.64 oz Power: 1.15 watts Field of View: 45°, symmetric Lens: Focus Free Operating Temperature: 0–40°C, 32–105°F