usb connector
1.USB A male to a male,a male to a female,a female to a female
2.gold / nickle plated
3.any color is available

usb connector 

.  gold or nickle plated

.  transfer rate:up to 5Gbps

.  compatible with USB2.0/USB3.0

.  increase 2 pair SDP,full-duplex data transfer

.  better power management to avoid unnecessary wasting