<b>AWBLIN Automotive Test Light 6-24V DC Circuit Tester, LED Auto Electric Tester Light Tool with Voltmeter and Probe<br><br>LED INDICATION, BIDIRECTIONAL VOLTAGE TESTING </b><br><b>Red Light For Positive</b><br>Attach the alligator clamp to the Ground and connect the probe to the Postive <br><b>Green Light For Negative & Ground</b><br>Attach the alligator clamp to the Postive and connect the probe to the Ground(Negative)<br><br><b>UPGRADED AUTO CIRCUIT TESTER:</b><br>√ Buzzer Sound with LED light <br>√ Anti-loss Needle Guard Protection <br>√ Dual LED Indication, Bidirectional Voltage Testing <br>√ Computer Safe <br>√ Large Size Alligator Clip <br>√ 102" Extended Spring Wire <br><br><b>WARNING: <br> Only for testing DC voltage, not allow for AC voltage. <br>Only for testing 6-24V. <br>Please make sure that the voltage value of the product to be tested is within this range before testing.</b>