Features: USB3.0 Straight-headed type extension cable with on off switch, faster and more stable transmission and more convenient control. Support charging and transmitting data without frequent plugging and unplugging, reducing plug loss. Suitable for USB3.0 interface devices, such as computers, USB fan chargers and more, backward compatible with USB2.0 and USB1.1. Environmental protections PVE material housing, soft and tenacity, easy to bend, not easy to deforme and break; pure copper cores, reinforced joints, not easy to rust, durable. This USB3.0 extension cable small in size and lightweight, portable designed, makes it great for travel, daily use and office work. Package Includes: 1x USB3.0 Extension Cable with Switch Specifications: Name: Straight-headed Type USB3.0 Extension Cable Contact: pure copper contact Material: environment-friendly PVE Wire Diameter: 4.5mm Wire Core: pure copper wire cores Cable Length: 10cm, 30cm, 50cm, 1m, 1.5m, 2m(optional) Length: 10cm/3.94", 30cm/11.8", 50cm/1.64ft, 1m/3.28ft, 1.5m/4.92ft, 2m/6.26ft note: Please allow 0-1cm error due to manual measurement. make sure you do not mind before you order. Please allow for slight color differences due to different monitor resolutions.