The black card achieves truly deep blacks (RGB 16,16,15).
The grey card displays superior spectral neutrality with measured values of 162, 162, 160.
The white card has a tested RGB value of (220, 224, 223).
The neck s-trap with quick-release plastics buckle on the end, convenient for your use.
Includes three color calibrated reference cards. It helps you get correct white balance, or color balance, allowing the camera to compensate for the illuminant color in a scene.
White Black 18% Gray Color Balance Cards Digital Grey Card with Neck-Strap DSLR Camera White Balance Card Photography Accessory