Original Automotive Electrical Circuit System Tester for Cars and Trucks 0V - 70V 1.Voltage & Polarity Testing-Determine DC/AC Voltage and Postive/Negative quickly. 2.Resistance Continuity Testing- LCD Screen display the value of resistance. 3.AC Circuit Singal Testing- Fast to trubleshoot the sensors circuit problem. 4.Components Activation in your hand, in the vehicle or W/Ground. 5.Testing Trailer Lights and Connections-10M extension cable allow your to test Cars or Trucks. 6.Checking for Bad Ground Contacts and Locating Short Circuits. Specifications: 1. Display: TFT color display (160 x 128 dpi) 2. Operating Temperature: 0 to 60C (32 to 140 F) 3. Storage Temperature: -40 to 70C (-40 to 185 F) 4. External Power: 12.0 or 24.0 V power provided via vehicle battery 5. 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.