Dear Customer, Hello please you choose your favorite product serial number can buy!

Serial Number: 1	?? Serial Number:?2
Serial Number:?3	?? ? ? ? Serial Number:?4

Brand: Excellent person
Interface properties: USB expansion HUB
Length: 0.8m 0.3m
Color: Black mobile tablet OTG OTG White Black HUB HUB mobile tablet white
Whether the external power supply: no external power supply