The dbx CT3 is an advanced cable testing unit allowing you to evaluate a large variety of cables with ease. The CT3 offers many common connectors such as RJ45, RJ11, MIDI, speaker twist, XLR, RCA phono, BNC, DIN, TRS, TS, DMX, & Banana. It can be split into 2 parts, a sender and receiver so preinstalled and long cables can be tested.