USB HUB & Warmer 4 USB 1.1 ports a type female connectors Downstream 1 USB b type male connector upstream with a cable Support both full-speed 12Mb/sec and low-speed 1.5Mb/sec transfer rates Chains up to 127 USB devices Individual port over-current protection Provide up to 500 mA per port sufficient for diverse devices Truly plug & play automatic installation DC jack for selectable USB Massage Ball 1) Massage human body for shoulder, thigh, waist, neck, back side, feet and hands 2) One touch on/off switch 3) Vibration speed: 3600 rpm 4) USB power: 4.0 - 5.5V (150mA) 5) Dimensions: 85mm x 43mm 6) Weight: 147g 7) 1.5 meters USB cable 8) Different colors are available 9) This USB massage ball only for massage purpose, not for medical treatment