♬Light weight and easy to carry, can be used at any time at home, in or on road. ♬This ball hand exerciser is compact and portable, allowing you to easily integrate hand grip training into your daily life. ♬Built in counter that can display the number of laps and rotation speed in real time, and record the highest speed to help users track exercise results. ♬Equipped with 5 variable speed lights that change with the rotation speed, increasing the rhythm of exercise, enhancing the fun of exercise, and reducing stress. ♬Silicone wrapped handle provides comfortable, nonslip grip, complementing palm rotation movements.