Features: brand new and high quality No need for power supply, you can quickly determine whether the 1.5V AA battery, AA battery, 9V square battery is sufficient. It is compact and easy to carry, and it is easy to put in a pocket or backpack. With indicator plate, the pointer directly displays the measurement result, and it is easy to check the battery status. Easy to use, simple to operate, just insert the battery, please pay attention to the positive and negative poles. A battery capacity measurement tool that is very suitable for home use and can tell you whether the battery is good. Specifications: Material: Plastic Type: Pointer Voltage Measurement Range: 1.5-9v Current Measurement Range: 40-375m A Internal Resistance Measurement Range: 4-215mΩ Temperature Measurement Range: 0-40℃ Size: Approx. 113x64x30mm/4.45x2.52x1.18inch Package Includes: 1x Battery Tester note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.