... )Material:silicone, pass CE,Rohs... 4)N.W:250G Hot sell 109Keys silicone folding keyboardmaterialuse100% silicone made, ECO-friendly,insipidity,avirulentcetificatePASS ... -lasting,actuation force flexibility,and improve type speed.it also can release negativeions.Easy to carry.key life:10,000,000 ...