Description: Materials: The car battery tester is made of ABS and copper plated clip materials, which are strong and wear resistant. It can be used to test 12 V 24 V or charging system v to ensure long term performance and reliabilityEasy to use: 12 V 24 V car battery alternator tester can analyze the battery condition through testing, with high reliability and performance, providing a reliable analysis basis for maintenanceQuality: Auto battery tester checker, professional manufacturing, stable performance, compact size, easy to carry, high sensitivity, fast response, quick and easy to useDesign: The auto battery tester is equipped with an LED display and LED indicator, which makes it convenient for you to read the measured value in poor visionFunction: Digital battery analysis has a alarm and overvoltage protection functions. The red clip is connected to the positive pole and the black clip to the negative pole. If the positive and negative clips are connected in , the LED display will not display. In the case, the indicator light will light up and an alarm will sound Specification: Materials: ABS, Copper Plated Clip Size Chart: Tester 20 cmx7 cmx2 cm/7.87 inchx2.76 inchx0.79 inchClip 6.6 cmx1 cm/2.60 inchx0.39 inchWire Length about 31 cm/12.20 inch Package Includes: 1x Car Battery Tester2x Clips1x Instruction Manual Note: Please allow slightly errors due to manual measurement and different monitors.