4-Speed vibration setting - This electric foam roller is equipped with 4 different vibration speeds, you can choose the right amount of speed and intensity that works for you. High-quality materials and rechargeable function - This vibrating foam roller is made of durable and high-quality materials so it won’t lose its shape. A full battery allows 4 hours of continuous use so it can give you a more enduring and better experience. Lightweight and portable - The trigger point foam roller only weighs 2.1lbs, ultra-portable design allows you to can enjoy your personal massage anytime, anywhere. Sports companion - This new generation deep massage roller is the perfect companion for people wanting to relax after running, yoga, climbing, weightlifting, martial arts, cycling, boxing, etc. Convenient rechargeable design - The electric foam roller can be fully charged only for 3 hours. You can use it for 4 hours after fully charge with the AC adapter. The other function is the smart 10 minutes auto-off function. FITINDEX Electric Foam Roller 4 Speed Vibrating Yoga Massage Muscle Roller Deep Trigger Point Sports Massage High-Intensity Massager Roller with Rechargeable Function Black - BLW5FKH74