USB Massage Ball, The product can be working out by hand and more efficiency to install between your body seating Seating . USB Massage ... port usb hub, usb light, usb memory hub, hub, usb, usb card reader, usb flash drive, card reader, bluetooth dongle, hdmi cable, wireless usb hub, usb 2.0 hub, light usb ... only for massage purpose not medical treatment. Color: blue/black USB Massage Ball (PM-UM-705)