• The adsorption noise of Choc is very small. There is no need metallic sheath or plastic cover on the periphery of Choc. It only need to paste a metal sheet at the bottom. In this way, the size will not be enlarged at one’s will and the holding feling keeps the same as originallly.
  • For the structure design of clamp, it is plugged and removed easily. The rubber clamp is not easy to fall off.
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