• PERSONALIZED TREATMENT:  Features 3 vibrating speed settings to release sore muscles, with 3 vibration frequency levels – 45, 68, 92 Hz • MULTIPLE APPLICATIONS:  Can be used to activate, soothe, or loosen muscles/fascia in the feet, calved, hamstrings, gluteus, hip flexors, shoulders, back, and forearms. • MAXIMUM VIBRATION: The high-intensity vibration allows you to release tension and target areas deeper than a traditional foam roller. • OPTIMAL SIZE:  Compact size 3.5-inch (8.89 cm), which is great for targeting hard to reach areas. This small size is great for travel.