TS25D test set with ABN kit (includes pouch and earpiece). The TS25D Test Set features data lockout and lockout override, making you completely safe in talk or monitor mode. Includes DSL/POTS filtering technology and a built-in analog tone generator. The Talk Battery function provides voltage to carry voice conversation on non-powered pairs. Also includes Caller-ID and Call-waiting Caller-ID function. Large LCD makes the intuitive menus easy-to-read and use.