Speed: 30 speed levels to give you a custom massage, with up to 3200 strokes/min. Relieves aches: Offers a really deep massage which aims to help back pain and muscle aches. Specifications: Works with up to 30lbs of force and 3.5 hours of battery life. Massage gun: Get a vibration therapy massage device in black. Includes: Four attachments for specific parts of your body, including the spine and joints. Versatile: Perfect for those who play sports, hit the gym or jog. Portable: Ease the pain away in the comfort of your own home! Led Vibration Therapy Massage Device | Living Social