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This is a portable dumbbell which can be controlled by adjusting the current to change the magnetic force.It also change the inconvenient way of traditional dumbbell.You only need to use your thumb to slide the adjustment rings so that you can control the magnetic force by yoursell,as well as the weight of dumbbell.It can provide different weights of dumbbell to you and make your life convetient.
Shenzhen Technician College
shenzhen, China
hongbin xu,
Shenzhen Technician College
quanfa wang,
Shenzhen Technician College