This CPL is applicable to the front camera of F7N series. IMPRCVED IMAGING QUALITY-Circular polarizer reduces light spots on bright surfaces and improves image quality by eliminating reflections from glass and water PROTECT THE LENS-Avoid wear and tear of the lens and prolong the life of the lens. Insulate from fingerprints and dust, just clean the CPL. SUPER AFTERSALES-Our greatest pursuit is to satisfy the needs of consumers. This CPL is backed by full 1-YEAR WARRANTY and 100% Satisfaction Guarantee. Email our customer service and we will answer any of your questions/concerns. We offer 7*24 hours technical support.