Details Blue ray filtering technology reduces eye fatigue and eye strain which ensures better eye protection. Made of tempered glass, processed with tiny cracked particles, which disperses impact and prevents burst. 0.18mm ultra thin, with superb tenacity and hardness from all-round protection for your phone. HD clear, super sensitive and smooth at touch. Maximum screen protection from bumps drops scrapes and marks. Operation Instructions Clean your phone screen with wet wipes & dry wipes. Rip off the coverage layer. Align button and receiver and apply it to your iPhone screen. Press at the central spot and use the cloth to sweep the entire screen. Only by 4 simple steps, your film is applied perfectly and exquisitely. We stand behind our products and guarantee quality with LIFE-TIME NO-HASSLE .