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LED Wrist Ball Trainer Gyroscope Strengthener Gyro Power Ball Arm Exerciser Exercise Machine Gym powerball Specification: Color: blue / inexperienced / orange / red Material: ABS, Metal alloy Light Source: LED * four Battery: (built-in) Size: 6*6 Packing List: Fitness Gyro * 1 Rope * 1 Instructions * 1 How to use: 1, conserving the wrist ball with one hand, the outlet a part of the upward, the alternative hand may be the head of the rope into the opening in the center of the ball 2, with the thumb of the hand preserving the ball, flip the ball forward, the rope tightly wrapped around the center of the ball in the center groove 3, when the rope round the center of the ball 1/2 a circle, stop turning the ball middle Use one hand to carry the ball, the opposite hand to drag out the rope soon and let the ball middle rotate at the fastest pace 4, immediately open the part down, with the wrist part of the ball, until you could feel the speed of the ball can continue to speed up Note: DO not drop the ball on difficult floor at any time,the heavy rotor will damage DO not contact the ball rotor when it's spinning at excessive speeds,it will burn