Product Description: USB2.0 HEAD FEMALE A/BACK FEMALE A   l Metal crust made of Aluminium Alloy, have black and silver for your choose, have black and silver for your choose,other color can be customized. l Fixed by nut, easy to install. l Operating Temperature: -25℃~+55℃(No Freezing) l Pane Cutout:  22 mm l Panel Thickness:1~ 10mm l Transmission Rate:≥30MB/s l operating Humidity: 45-85%RH(NO Condensation)