This monitor hood reduces light reflection for on screen color consistency. The inside of the hood is made with anti-glare material. Size is adjustable to fit the monitor. Also, a photo sensor can be attached to the monitor and removed with the hood in place thanks to a sliding plate at the top.Features:Light shielding angle from above: CH4: 22" monitors: 24.1°Light shielding width for sides and top: CH4: 150 mm