1. material: the product made of hight quality silicone 2. low/heat resistance:-25-250 temperature. 1.Buttons with good bounce, conductive performance better, long life and strong aging resistance,dustproof,waterproof etc.2.good rebound resistance and tear resistance, Soft ,smooth, flexible, non-stain and water –resistant etc.3.it’s key never fall off and fade or change colour4.the product was ...