Check the listing for details. ELENCO model TT-400 TELEPHONE LINE ANALYZER BOX. Condition: Used. Listed at 29.96 USD. This ELENCO model TT-400 Telephone Line Analyzer Box is a must-have for professionals in the business and industrial sector. It is designed to accurately test and measure telephone lines, making it an essential tool for technicians and engineers. With its durable construction and reliable performance, this analyzer box is perfect for use in a variety of applications, including testing, measurement, and inspection. The ELENCO brand is known for producing high-quality tools, and this model is no exception. Whether you're a seasoned professional or just starting out, the ELENCO model TT-400 is the perfect addition to your toolkit. The phone jack holder clip has broken off but this does not affect the function of the unit. Please see pictures for details. Thank you very much we do appreciate the business.