Kiplyki Decompression Conjoined Massage Ball Vent Sensory Educational Toys for Children Features: With its delicate design, it can perform various functions including mobilizing joints, releasing tension, improving posture etc With its soft touchs sensation, you will feel much more comfortable while using it Applicable to different parts of your body such as shoulder, spine, neck haunch and so on Effective for relieving fatigue: Spiky sensory points release tension, Massage muscles, stimulate nerves and increase flowing to promote healing Playing with the -piece massage ball is a good way to feel. The unique design makes it very compelling to hold in your hand, which is a bonus! Hold the ball on the left with hand, and flick the ball on the right with the right hand. The small ball emits a soft sound. Close your eyes and listen, which has a certain effect of relieving pressure. Easy to use: You can just use it whenever in a office even when you watch TV Specificaitions: Material: ABS Size：3.5x4x7.5cm/1.4x1.6x3in Package Included: 1 x Massage Ball Features: With its delicate design, it can perform various functions including mobilizing joints, releasing tension, improving posture etc With its soft touchs sensation, you will feel much more comfortable while using it Applicable to different parts of your body such as shoulder, spine, neck haunch and so on Effective for relieving fatigue: Spiky sensory points release tension, Massage muscles, stimulate nerves and increase flowing to promote healing Playing with the -piece massage ball is a good way to feel. The unique design makes it very compelling to hold in your hand, which is a bonus! Hold the ball on the left with hand, and flick the ball on the right with the right hand. The small ball emits a soft sound. Close your eyes and listen, which has a certain effect of relieving pressure. Easy to use: You can just use it whenever in a office even when you watch TV Specificaitions: Material: ABS