Features: *Car battery detection: After the correct connection, the LED display will show the real-time voltage of the measured voltage, and the LED light will be on to indicate the battery status *Test the status of the charging system of the generator: When testing, please keep the tester correctly connected to the battery terminal, and then start the generator, at this time the output voltage will be displayed on the LED display, and the right LED indicator light is on to indicate power generation machine state * With LED anti-display screen, the backlight is also clear: the test will display the anti-display screen, and the measured value can be seen clearly at night or in the dark to assist the measurement work and easy reading * Positive and negative crocodile clips: with reverse connection alarm and overvoltage protection function, the red clip is connected to the positive pole "+" and the black clip is connected to the negative pole -", if the connection is reversed, the LED display will not display, the REVERSE indicator will light up and an alarm will be issued * Widely used in the auto repair industry: especially suitable for maintenance technicians of automobiles and electric vehicles, as well as maintenance and repair of vehicles for families and enterprises Specification: Brand: ANENG Product model: BT-171 Name: Battery tester Test method: positive and negative test clips Product material: ABS insulation material Test voltage: 12V LED lights: Red/Yellow/Green/Blue/White Product size: 115*70*20mm/4.53*2.75*0.79inch Product weight: 78g Instructions for LED lights FULL full charge: the LED light is on, the battery is in a normal state MEDIUM: LED light is on, the battery voltage is slightly low and needs to be charged LOW Low power: LED light is on, the battery is low and needs to be charged, and the buzzer alarm EMPTY No power: LED light is on, the battery is completely empty and needs to be charged HIGH voltage high: LED light is on, alternator output voltage is high GOOD voltage is good: the LED light is on, and the output of the alternator is normal DEAD fault: The LED light is on, the battery voltage is too low, and the buzzer alarm prompts that there should be a problem with the battery. At this time, the battery should be checked by a professional engineer to see if it is replaced Reverse positive and negative poles of RECERSE: LED light is on, the battery tester is reversely connected to the battery terminal, and the buzzer alarm prompts Packing list: 1*battery tester 1*Instruction Manual Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. Car battery detection: Displays real time voltage on the LED screen after proper connection with an LED light indicating battery status Charging system test: Connect the tester to the battery terminal and start the generator to view output voltage on the LED display with an indicator light showing the generator's status Clear LED anti display screen: The backlit screen ensures visibility of measured values in low light conditions facilitating easy reading Safety features: Equipped with positive and negative crocodile clips reverse connection alarm and overvoltage protection If connected incorrectly the LED display will not show and the REVERSE indicator will activate with an alarm Versatile application: Ideal for use in the auto repair industry suitable for maintenance technicians of automobiles and electric vehicles as well as for family and enterprise vehicle maintenance