Features: 1.With the function of checking the battery, power function test, checking the starting capacity of the battery and battery overcharge displaying. 2.6 LED lights show the status of the battery and alternator, green means good/full, orange means medium, and red means low. Intuitive and simple. 3.The reverse protection function can prevent burnout due to misoperation between (+) battery terminals and (?) cable terminals. 4.Pure copper wire and wire clip have excellent conductivity and high sensitivity, and the non?slip designed allows you to use it flexibly even when wearing gloves. 5.Suitable for all 12V charging systems, including car, forklifts, SUVs, pickups, boats, RVs, motorcycles, etc. Specification: Condition: Brand New_x000D_ Item Type: Automotive Battery Tester_x000D_ Material: ABS_x000D_ Color: As picture shown_x000D_ Cable Material: 0.06mm Square Copper_x000D_ Maximum Voltage and Current: 12V 15A_x000D_ Application: Suitable for all 12V charging systems, including car, forklifts, hybrid vehicles, SUVs, pickups, boats, motorhomes, motorcycles._x000D_ _x000D_ Main Function:_x000D_ 1. Check the battery_x000D_ 2. Power function test_x000D_ 3. Check the starting capacity of the battery_x000D_ 4. Battery overcharge display_x000D_ _x000D_ Wiring Method:_x000D_ Connect the red wire clip to the positive pole (+) of the battery and the black wire clip to the negative pole (-) of the battery._x000D_ _x000D_ 6 LED Lights:_x000D_ Alternator State Check: _x000D_ First Light (Red): Fault_x000D_ Second Light (Green): Good_x000D_ Third Light (Green): Full _x000D_ Battery State Check:_x000D_ First Light (Yellow): Middle_x000D_ Second Light (Red): Low_x000D_ Third Light (Green): OK _x000D_ _x000D_ Different LED display to show Battery Sate:_x000D_ Display 1: All LED lights off; testing results: none charging voltage, dead battery_x000D_ Display 2: "ON" led twinkling, other led off; testing results:4.6-11.2v charging voltage, engine being hardly turned on, turn off all electrical equipment and charge battery immediately._x000D_ Display 3: "ON" led on,"low led twinkling; testing results:11.2-11.6v charging voltage, low charged battery, being charged immediately._x000D_ Display 4: "Low" led on, "middle" led twinkling; testing results: 11.6-12.2v charging voltage, middle charged battery, better being charged sooner._x000D_ Display 5: Middle" Led on; Testing results: 12.2V Charging Voltage, Middle charged Battery, better being charged._x000D_ Display 6: Middle" Led on, "Full" Led twinkling; Testing results: 12.2-13.1V Charging Voltage, Middle charged Battery, better being charged._x000D_ Display 7: Full" Led on, "Good" Led twinkling; Testing results: 13.1-14V Charging Voltage, Good battery, Full Charged_x000D_ Display 8: "Good" Led on; Testing results: 14V Charging Voltage, Good battery, Full Charged._x000D_ Display 9: "Good" Led on, Fault" Led twinkling; Testing results: 14-16V Charging Voltage, Battery may be damaged, Check the engine and tester._x000D_ Display 10: Fault" Led on; Testing results: Above 16V Charging Voltage, fault Battery. PackageList: 1 x Battery Tester1 x Manual