This also allows you to quickly switch the ball from foot to foot.
这也允许你快速的在脚与脚之间转换皮球。
Main features: ball bearing, flexible switch, no noise, long service.
主要特点：滚珠轴承，开关灵活，无噪音，寿命长。
Main features: ball bearing, flexible switch, no noise, long service life.
主要特点：滚珠轴承，开关灵活，无噪音，寿命长。
Main features: ball bearing, flexible switch, no noise, long service life.
主要特点：滚珠轴承，开关灵活，无噪音，寿命长。
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