For reliable operation of digital audio and MIDI you need to be careful not to use very long USB cables. The USB specification recommends the following lengths:
- USB 1 devices have a maximum cable length of 3 meters (about 9 feet and 10 inches) and the maximum total length of all the USB cables connected to your computer should not exceed 18 meters (about 59 feet). iConnectivity mio and MIDI+ devices use USB 1.
- USB 2 devices have a maximum cable length of 5 meters (or about 16 feet and 5 inches). iConnectivity AUDIO devices use USB 2.
- USB 3 devices have a maximum cable length of 3 meters (about 9 feet and 10 inches), though this is highly dependent on cable quality. No current iConnectivity devices require USB 3.