Description:   Automotive Electrical Circuit Tester for diagnose 12 to 24 volt automotive electrical system, is a must-have for auto technician.  Voltage & Polarity Testing-Determine DC/AC Voltage and Postive/Negative quickly.  Resistance Continuity Testing- LCD Screen display the value of resistance, AC Circuit Singal Testing- Fast to trubleshoot the sensors circuit problem.  Testing Trailer Lights and Connections-10M extension cable allow your to test Cars or Trucks, Checking for Bad Ground Contacts and Locating Short Circuits  Two Kinds of Supply Modes, Powers by cigarette lighter or car battery  You won’t regret owning such a reliable, multi-functional kit.   Specification:   Type: Automotive Electrical Circuit Tester  Model: P100  Display: T-FT color display (160 x 128 dpi)  Operating Temperature: 0 to 60°C (32 to 140 F°)  Storage Temperature: -40 to 70°C (-40 to 185 F°)  External Power: 12.0 or 24.0 V power provided via vehicle battery  Dimensions: Length 165 mm * Width 40 mm * Height 27 mm    Test Tool Specifications:  DC voltage range : 0-65V +1 digit  Resistance range : 0-200 K ohm  Frequency response of tone pass through  0Hz to 10K hz.  Circuit Breaker  Rating current: 1-10 Amp    Testing Standard:  100% current : no trip  150% current: trip in one hour  200% current: trip in 3-30 seconds.  300% current: trip in 0.5-4.0 seconds.   Package Includes:   1x Electric Circuit Tester kit   Note:   1.Please allow 1~3 cm error due to manual measurement, thanks.  2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thank you