... Rohs... 4)N.W:250G 109Keys soft,waterproof silicone computer keyboardsmaterialuse100% silicone made, ECO-friendly,insipidity,avirulentcetificatePASS ,SGS ... EU -standars.usagewindely use all of kinds desktop computer.featurewater-resistant,long-lasting,actuation force flexibility,and ... .it also can release negativeions.Easy to carry.key life:10,000,000 timessample times3daysdesignaccording clinet's ...