The MTC45 is a 2-in-1 Tone and Probe generator as well as an auto ranging multimeter. The meter tests include wire trace, continuity test, clear/busy ringing, line test and tip/ring identification. The unit is supplied with crocodile clips for non-terminated cables and modular connectors for direct connections to telephone and internet wiring. The DMM can measure AC/DC volts, AC/DC current, Resistance Diode and has a continuity buzzer. Accessories: Carrying Case 9V Battery AAA Test Leads Crocodile Clips Instruction Manual Features : Tests include wire trace, continuity test, clear/busy/ringing line test and tip/ring identification Alligator clips for non-terminated cables and modular connectors for direct connections to telephone or internet wiring Built-in speaker on probe with sensitivity control Selectable continuous or variable tone generation Insulated inductive probe tip prevents shorting conductors Measures ACV and DCV up to 600V, ACA and DCA up to 200mA, Resistance to 20MΩ, Diode and Continuity RJ11 Modular Connectors CATIII 300V and CAT II 600V