Battery Tester Product Description Features: Perfect for Auto Repair Industry: Ideal for automobile, electric vehicle maintenance technicians, families, enterprises, and vehicle maintenance. Generator Charging System: Accurately displays output voltage and generator status on the LED display when connected correctly. LED Reverse Display Screen: Allows clear visibility of measured values even at night or in dark conditions. Car Battery Detection: Displays the voltage under test on the LED display and indicates battery status with an LED light. Alligator Clip: Ensures correct connections with positive and negative electrodes; no display if connected incorrectly. Specifications: Model: BT-171 Material: ABS Test Method: Positive and Negative Test Clip Test Voltage: 12V LED Light: Available in Red, Yellow, Green, Blue, and White LED Lights Related Instructions: FULL: Battery is in normal condition MEDIUM: Battery voltage is slightly low and needs charging LOW: Battery is low, requires charging, and triggers a buzzer alarm EMPTY: Battery is completely dead and needs charging HIGH: High output voltage from alternator GOOD: Alternator output is normal DEAD: Battery voltage is too low, accompanied by a buzzer alarm suggesting professional inspection RECERSE: Incorrect connection leads to reversed display and buzzer alarm Item Size: 115 x 70 x 20mm / 4.53 x 2.75 x 0.79in Item Weight: 78g / 2.75oz Package Weight: 100g / 3.53oz Package Size: 14 x 8 x 4cm / 5.51 x 3.15 x 1.57in Package List: 1 x Battery Tester 1 x User Manual (English)