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[usb hub 3.0 OTG adapter] Unitek usb 3.0 hub 4 port Bus-Powered Compact HUB with a Built-in 1ft USB 3.0 Cable for Ultra Book, MacBook, Notebook or Smartphone Tablet-pc with OTG function, required no external power supply
coupon: GOSDBPVB
price: $ 7.99 after coupon
free prime shipping
http://www.amazon.com/gp/product/…3W8HSNOXQZ