Function: Display: 3.2inch large LCD color screen for display functions status measuring results, analogue bargraph shows the battery lifespan after finishing tests.   Support 12.0V and 24.0V Batteries: Automatically identify 12.0V or 24.0V batteries, and select smart measurement with one key. Various types of batteries are optional, supporting matching of various types of batteries, EN, IEC, CCA, SAE, DIN. Multiple Protections: Support input overvoltage, reverse polarity connection, high voltage connection protections and poor contacts of test clip. Simple Operation: Allows to connect the car battery, it does not need to take out the battery for testing. The battery detection operation is simple, and it is easy to understand the battery status. The larger the CCA value of the battery, the smaller the internal resistance. What You Get: Optional basic model 2201: 1x Battery tester, 1x Leather bag, 1x User manual.     Specifications: Item name: Smart Battery Tester Model: Model 2201/Model 2202 optional (2202 with charging capability and temperature measurement). Material: TPR materials Color: As shown Screen size: 3.2 inch color screen(55*57mm four color screen) Battery: 12V/24V activated lead-acid battery Internal resistance measurement: Support Current of discharge: Support Analysis of lifespan: Support Electric quantity detection: Support Ability to starts: Support Quality of battery: Support Function of lighting: Support Car starting test: Support Vehicle load measurement: Support Temperature detection: Upgrade model 2202 Only Vehicle charging capacity: Upgrade model 2202 Only Range CCA: 100-1999 Range of capacity: 3AH-250AH Test method: Four-wire Kelvin test Battery selection criteria: STD/AGM/GEL/EFB/EN/IEC/CCA/SAE/DIN Power supply power: Storage battery power supply/power supply other: White backlight, overvoltage protection, reverse input protection. Package size: 216*145*49mm / 8.50*5.71*1.93in Package weight: 2201: 480g / 16.93ouce, 2202: 535g / 18.87ouce.   Attention: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 10-30mm.