Features: * With metal balls inside it will produce musical sound following shake of your hand which is a great accompaniment for you when playing a guitar ukulele etc. * It is also helpful to train your rhythm. * Made of ABS material eco-friendly and durable. Feature strong transparency and no deformation. * Smooth elastic rubber band fits well any finger as easy as wearing a ring. Specifications: Material: ABS Color: Yellow / Black / White / Red / Green (Optional) Item Size: 3.8 * 2.5cm / 1.5 * 0.98in Item Weight: 12g / 0.42oz Package Size: 10.3 * 7.2cm / 4.06 * 2.83in Package Weight: 17g / 0.6oz Package List: 1 * Finger Shaker