The specification of the solar powered auto darkening goggle:

Viewing Window: 98mm X 35mmSwitching Speed: 0.5 MillisecondsDark To Light Delay: 0.2 SecondsPower Supply: Solar PanelsPower Backup: Rechargeable BatteryEyes Protection: UV / IR To Shade 16Sensor: Two Independent Wide Range Photo SensorsEnclosure: Dust Resistant

Thickness: 1/5 (4.8mm)

Operating Temp.: +14 --- +148 Degrees F (-10 --- +64 Degrees C)

Storage Temp.: +14 --- +148 Degrees F (-10 --- +64 Degrees C)

Dark Shade 10

Light Shade 2.5