The Triplett LVPRO20 Low Voltage Pro Multifunctional Cable & Network Tester is capable of running a variety of cable testing procedures, including Cable Map, Ethernet Switch Port Blink, Speaker Pop, and Cable Length. It also features an adjustable backlit display as well as the capability to attach Test Modules. The LVPro is compatible with speaker cable, coax, alarm cable and Category cable (CAT5,6); furthermore, if you have a unique cable, the LVPro has adjustable VOP, a technology that allows it to be tuned to your cable. A web upgrade allows users to easily expand the functions of the LVPRO Model 20, while wall jack and speaker ID kits are available separately for performing various tests.