Professional quality LED computer safe testing tool Suitable for testing injector pulse, automotive computer circuits and all primary automotive electrical circuits High impact transparent acetate handle, stainless steel probe, LED polarity indicator, long lead and crocodile clip Handle illuminates red when circuit is active in positive polarity and green when in negative polarity Ideal for use on circuits where sensitive testing is required High impedance protects computer Voltage Range: 3-12V Lead Length: 1200mm Probe Length: 75mm