Use as an extra or replacement cover for your RT200 series computer.. Making space from the Stem, and spares more space from your handlebar. Standard length mounting vetta computer batteries and battery caps wireless transmitter battery cap for rt and v100 computers kit has speed sensor wire that will reach front wheel fork Extended length mounting kit has long speed sensor wire that will reach rear wheel chainstay. For upgrading to wireless or using computer on additional bike. Standard length cadence and speed mounting kit has speed sensor wire that will reach front wheel fork Extended length cadence and speed mounting kit has long speed sensor wire that will vetta computer batteries and battery caps wireless transmitter battery a23, 12 volt for rt and v100 computers reach rear wheel chainstay Place the Cycling Computer or other facilities right in the field of your vision.