1.Zinc alloy chrome-plasted button
2.Solid framework
3.Electroconductive rubber
4.PCB
5.Metal bottom plate
Main features:Highly antidestructive powerForce 160-180 gramsContact resistance<100 ΩService life≥ 500 thousand Main components: Zinc alloy chrome-plasted button Solid framework Electroconductive rubber PCB Metal bottom plate Users choice: Button chrome-plasted colors: polished or sandblasted chrome Other usage keyboard is available besides using for telephone.
