The Ideal 151052 is a battery module for the NaviTEK II and SignalTEK II tester. The module lets you use four AA batteries to power the testers. The SignalTek II tests fiber optic and copper cabling to IEEE 802.3ab and other Gigabit performance standards for use in commercial networks. The NaviTEK II model facilitates LAN testing over copper networks and includes functionality for detecting PoE. Ideal Industries was started in 1916 by J. Walter Becker. His belief that every product should be worth more than the price paid for it has been the core IDEAL business principle for over 90 years. Today, the many loyal distributors and customers that make IDEAL successful are a testament to Becker's original philosophy.