"The SimpliFiber® Test kit comes with two units: The SimpliFiber 850nm/1300nm Source and the SimpliFiber Meter and is available in both ST and SC models. The CertiFiber® even has a loopback mode, allowing the main unit to function without the use of the remote. This way, you can test a single fiber on a spool."... Click here for more info on Fluke Certifiber Test Unit.