This is the most effective massage ball pelvic floor exercise. Use 15-30 minutes a day. In just a few weeks, you’ll feel the difference and gain stronger, firmer pelvic muscles. Classic Mode: 9 vibration frequencies; Music Mode: You can play music while doing massage pelvic floor exercises; Shake Mode: You can shake your phone to control the vibration frequency and intensity; Interactive Mode: You can Add Friends and make video calls.