RUCHBA Nano-soft-glass screen proector compatible with Apple watch compatible with iwatch series 4 40mm 3D Curved design for Full Protection Our 3D Curved screen protector can cover your apple watch glass screen fitly, protection from daily scratches/friction High transparency with excellent Viewing Quality High light transmittance ensures maximum resolution, you can barely feel the existence of this protector when reading or watching High Responsive & Sensitive True Touch Highly responsive and sensitive touching performance makes sure your device work fast/smoothly Easy installation Read our Manaul carefully. This screen protector can be easily installed without bubble, removed without residue