Function: Muscle Relex ApparatusMaterial: PvcPrinciple: the use of gyroscopes (inertial eccentricity + fixed rate) Power: from wrist spin to produce power, without batteries and plug rotation, the faster you generate the stronger the momentum. Rotational speed per minute up to 12,000 (RPM) turn over. Usage:1. To start, hold the ball in your hand with the exposed gyroscope facing left, insert the included red string into the hole, wind it up, and pull straight down, fast enough to have the gyroscope turn the LED on.2. Then turn your hand facing down, and slowly start to rotate. The gyroscope will start to "bite" and you will feel like it is scratching against the inside of the wrist ball.3. To keep rotating your wrist and the gyroscope will spin faster and develop a higher pitch sound. Once you have it spinning fast enough, you can stop your hand and feel it oscillating right in your palm.Features:1. Enhanced grip endurance, wrist arm and other best weapon, and can promote blood circulation, strengthen the wrist ligaments reduce injuries.2. It is a very interesting sensation and definitely makes your forearm sore and gets the blood going. 3. So, on your 5 minute break take it out and give it a go. You will be impressed on what this device can do for you. It works on your grip, forearm, and blood flow you will be amazed.4. The world's smallest, most kinetic energy a ball, all ages, and is not restricted by space activities at home watching television outing ,climbing car anywhere and can be used.
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