This portable light tension guitar finger exerciser is designed with small and appearance, easy and convenient to operate, it can increase your finger speed, strength and independence, suitable for the auxiliary exercise of instrument playing, physical exercise and other activities. Features - ColorAssorted Color - Material: Silicone. - Size: Approx. 7.8x7.8x0.3cm. - Unique ergonomic design allows you to exercise fingers, while practicing the correct action for playing musical instruments. - Practice without your instrument anywhere anytime, increase finger speed, strength and independence. - Designed for all instrumentalists, from beginners to professionals. - Suitable for the auxiliary exercise of instrument playing, physical exercise and other activities. - It can strengthen the finger muscle and relieve the sore of your fingers. Package list: 3 x finger trainer