Car Battery Tester 0 65V Voltage Checker with 4 Diagnostic Functions for 12V 24V Vehicle Electrical System Features： 1、Application: Car electrical circuit tester suitable for all 12/24V car batteries, with 4 diagnostic modes, professional performance and reliable design to meet your usage needs. 2、Function: The diagnostic provides a comprehensive analysis of battery health to help you know the status of your battery in advance before it runs out. 3、Security Protection: Designed with reverse polarity protection, if the positive and negative polarity is reversed, it will not damage the device and will not affect the car or the battery. 4、Real Time Monitoring: The voltage of the car starting system and charging system can be monitored in real time to help users fully understand the data and characteristics of the car battery. 5、Accurate Diagnosis: Built in intelligent microprocessor, making the test fast and accurate, the test results can be displayed within two seconds, bringing you an excellent use experience. Specification： Item Type: Car Electrical Circuit Tester Material: ABS, copper Product Model: P100 PLUS Operating Voltage: 0-65V Resistance Range: 0-100 kΩ Rated Current: 1-10ampere Frequency Response of Sound Channel: 0Hz to 10Khz High Voltage Capability: Display up to 60 volts, 0.1 volts resolution Three Additional Modes: MIN/Maximum/Sound monitoring 4 Diagnostic Modes: DC Voltage: Touch the probe tip to the circuit, then the LCD display will read the DC voltage with 0.1 volt resolution AC Voltage: Touch the probe tip to the circuit, then the LCD display will read the maximum value. Voltage, Minimum Voltage, Frequency and Duty Cycle Resistance: Touch the probe tip to the circuit, then the LCD display will read the resistance between the tip and the auxiliary ground wire Tone On/Off: Simply press the mode button quickly to turn the tone on or off, while pressing (and releasing) the mode button quickly, if you hear a short high tone, the audio tone is on, if you hear a short low beep, the audio tone is low Application: Suitable for all 12/24V car batteries Package List： 1 x Circuit Diagnostics Kit(6PCS) 1 x Tool Box  1 x User Manual