Multi-function LCD Auto Power Electric Circuit Tester Multimeter Car Repair Tool Features: Max display : 1999 Switching rate: 3 times/ second Range Mode : Active combination of full-automatic or full-manual range Polar indication: Automatic Working voltage: 2.4v--3.6v Low--voltage indication: about 2.4v Buzzer frequency: About 2.7kHz Test lamp: DC 0V--30V LEC TEST LAMP: DC 0V-30V Aging wire test gear: DC OV-30V Feeler: All tests directly Color:Red/Yellow Description: 1. Connect the alligator clip of black test pen to the ground, turn the knob switch to the voltage measurement gear, use the feeler to hook the detected rubber cover wire, press down trigger, and head the probe against the front detected rubber cover wire. In case of any power in wire, LCD will naturally display accurate voltage in wire. (0V-60V DC voltage can be measured). 2. Press function switch key (SELECT), LCD will display alternating current symbol (AC) to measure 0V-380V AC voltage. For the decorations of auto electric appliances, many control wires or signal wires must be searched. If you use general tools (multimeter or test lamp), rubber cover must be damaged for searching, which is inconvenient and easy to hurt hands. You can accurately detect the control or signal wires that you need under the situation of no damage to rubber cover, as long as you hook the detected wire with this tool and press down trigger, which is convenient and efficient. Package include: 1 x Automobile Circuit Tester 1 x Multimeter Probe 1 x Alligator Clips 1 x User Manual