Features:; Alternator state check.; Battery state check.; Battery overload display.; 6-LED display, clearly present the alternator and battery state.; Two testing clips for safe and easy operation.; Small size and light weight, convenient to carry.; Fit for car, motorcycle, etc.; Suitable for 12V lead acid batteries, hardtop batteries, discharge batteries and maintenance free batteries heavy duty insulated clamps.; Easy and safe to use, no sparking.; With a good chip inside, not easy to get hot on the surface.; Mini 12V Car Battery Tester Digital Alternator Automotive Tester;; 6 Lights Display Car Diagnostic Tool Automotive Current Tester; 6 LED Lights:; Alternator state check:; First light (red): Fault; Second light (green): Good; Third light (green): Full; Battery state check:; First light (yellow): Middle; Second light (red): Low; Third light (green): OK; Specification:; LED quantity: 6 (2 red, 3 green and 1 yellow); Material of wire: 0.06square millimeter copper; Max. voltage and current: 12V 15A; Length of wire: 25cm / 9.84in; Battery tester size: 12 * 5.2 * 1.8cm / 4.7 * 2 * 0.7in; Features: Portable; Functions: Improve driving safety; Material : Plastic, Copper; Color : Gray; Package List: 1 x 12V Digital Battery Alternator Tester