The SignalTEK II is a handheld network tester that includes two handheld devices and a set of standard accessories, all stored in a semi-hard carrying case. Two models are currently available: the SignalTEK II and the SignalTEK II FO. Both models have the same test coverage. The SignalTEK II can be connected via RJ45 ports; the SignalTEK II FO can be connected via RJ45 ports and fiber optics.