JASTIND professional digital Circuit 3-48V Tester Designed for car electrical circuits,automotive battery, battery charging systems,ignition systems,which is a must have tool for any automotive engineer ,electronic engineer or circuits DIY .<br> *3-48v widely use for circuits test.<br> *.1 Accuracy voltage reading on white Backlit digital display.<br> *.Made with sharp stainless steel probe for piercing wires, for hard to reach areas.<br> *.Portable 140 In m long enough PU spring wire for easy operation <br> *.Constructed with acetate fiber, high toughness and shatter-proof.<br><br> <b>Please Note</b><br> This is a negative mode one-way current circuit tester,when do measuring please attach the clamp to the grounding or negative pole.