Four prong deep-kneading Shiatsu massage melts away neck and shoulder tension for stress-relieving comfort High and low intensity settings let you customize your massage for gentle relaxation or deep muscle relief Soothing heat enhances relaxation and helps ease stiff muscles Long comfort flex handles provide easy reach to target every spot for a thorough massage Convenient integrated controls and hands-free straps make it simple to enjoy a massage while multitasking or relaxing Rechargeable 2,000mAh lithium battery delivers up to 70 minutes of run time for extended, uninterrupted relaxation