<b>If you are Mechanics or Auto Enthusiasts, you will gonna love KZYEE KM10 Auto Circuit tester.</b><p><b>Powerful and Mulit-function, One Tester Multipurpose</b></br> KM10 Professional Power Circuit Probe, support 10 functions: Voltage & Polarity Testing, Continuity Testing, Signal Circuit Testing , Activating Components in hand as well as in the vehicle. And Testing Trailer Lights and Connections, Activating Components W/Ground, Red/Green Polarity LED, Following & Locating Short Circuits, Checking for Bad Ground Contacts</p><p><b>Two Different Power Source, Worry-Free</b></br>Powered via the vehicle by connected to battery cigarette lighter or battery electrode. </p><p><b>Built-in Red/Green Polarity LED</b></br>Easy to Determine the Positive, Negative and Open Circuit</p><p><b>LCD Screen Display, Easy to Read Indicated Test Results</b></br> A Large color LCD screen, can display all the test result, save your time on diagnose car electrical problems. </p> <p><b>Head Lights & Audio Tone, Make It Possible to Work in the Dark</b></br>Built-in front LED flashlight , allow to work in the dark environment. Audio tone indicator allows for no-look menu scrolling once users are familiar with menu tone assignment. </p> <p><b>Circuit Breaker Protection Technology</b></br> Ability to Power Up Components. Automatically shut-off if current exceeds 5 Amperes, it design to protect an electrical circuit from damage caused by over current, typically resulting from an overload or short circuit. </p><p><b>Specifications</b></br> Display:TFT color display (160x128 dpi ) </br>Operating Temperature: 0 to 60℃ ( 32 to 140℉) </br>Storage Temperature: -40 to 70℃ (-40 to 185℉ ) </br>External Power: 12.0 or 24.0 V power provided via vehicle battery</br>Dimensions (L*W*H): 178*47*28mm (7*1.85*1.10in ) </br> Net Weight: 0.1Kg (0.22LB) </p><p><b>Warm Note: </b>This probe is very sharp on the pointed end, easily to get hurt. Better to be more careful when performing. </p>