KYTO Multifunctional Wrist Force Device New Electronic Health Ring Centrifugal Ball Unisex Hand Trainer Timing Speed Trainer The intelligent core fitness ring can display the real-time speed of exercise duration and exercise strength Summary Mode, Time Mode, Power Mode The core rotates with the wrist and uses the principle of 3D acceleration sensing to record the movement duration and movement force If you are strong, it will strengthen the centrifugal resistance principle of centrifugal force. When the speed is greater, the inertia generated is greater, and greater force control is required, thereby driving the body muscles to move. Anti-slip handle: The curved handle fits the wrist and can be held firmly even under strong vibration Product name: Jianli ring Battery: AG12, 1.5V environmental protection Product function: exercise arm and wrist, display exercise duration and exercise strength Instructions for use 1. One-handed/two-handed middle handle for horizontal or vertical grip 2. Rotate the strength ring clockwise/counterclockwise to drive the stainless steel ball to rotate in the tube 3 Combining body strength and training parts, the faster you turn, the faster you feel the natural eccentric strength for targeted training Press up and rotate the hand-held strength ring vertically, so that the arm and the arm are at 90 degrees, and perform the up and down press training Exercise parts: front deltoid, middle deltoid Bend the arms with both hands, rotate the strength ring vertically in front of the chest, and curl up over the shoulders for targeted training Exercise parts: biceps, brachialis Lateral raise, hold the strength ring and rotate horizontally, raise the arm to the level of the shoulder for training Exercise parts: biceps, brachialis size:210x60mm Material:ABS colour:Blue Black Package Contents: 1 x ring of power Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.