The TS-18 from Belden consists of two parts. The POWER unit has two F-fittings and a red light in the middle. The TONE unit has one F-fitting and a buzzer in the middle.
The POWER unit has two 9 volt batteries that are wired in series to provide a total of 18 volts of working power. The power unit also has two battery compartments inside the enclosure to hold the batteries in place if the unit is dropped.
The two F-fittings on the POWER unit are designed to fit the "F" connector and the male "F" connector.
The TONE unit has a male "F" fitting and a buzzer inside the enclosure.
The Belden Name now encompasses the PPC, ICM Corp, Cable Pro, and Thomas & Betts names.