The USB 2.0 specification limits the length of a cable segment between the host or hub and device to 5 metres. This USB 2.0 active extension cable takes the signal from the first device and resynchronizes and retimes the signal so it can be transmitted another 5 metres without any loss of data. You can daisy chain a maximum of three active extension cables to give you a maximum extension length of 15 metres | Hi-Speed USB 2.0 Compliant | 1 x USB Type A male connector | 1 x USB Type A female connector | Supports data transfer rates up to 480Mbps | Host powered - no need for external power adapter | Supports Windows 2000 / XP / Vista / 7 (32/64-bit) | Supports Mac OS 10.x and Linux 2.6+