Product Specifications: 100% Genuine Tempered Glass 9H Hardness,3 times stronger than regular PET film Scratch Resistant absorb shocks shatter resistant Waterproof easily cleaned. screen protector is adhered to phones with a silicon adhesive to keep it in place in case of screen damage, the screen protector will break into small pieces that are not sharp, making it a lot safer than other glass screen protector available in the market Instruction For Installation: 1.Please clean the surface thoroughly. 2.Remove out all the dust using the sticky tape. 3.Peel first layer and position Nuglass on the surface. 4.Once Nuglas is positioned, press the middle part of Nuglas and work carefully toward edges. 5.Nuglass can be taken off and re-apply, by peeled from the comer only. But easy to get air bubble after repealed,highly recommend to put it in the exactly right position in your first try. 6. If you have the bubble edge(Also call Halo effect or White air edge) Put a dab of Olive oil(or any Vegitable Cooking oil) on a q-tip (cotton earbud) and apply it like a marker pen around the edges where your phone's screen and tempered glass meet and it will get rid of the Halo effect almost instantaneously, and then clean off the oil from the screen / glass. Package Includes: 2x 2PCS Tempered Glass Screen Film Protector For ZTE Visible R2 Cell Phone