Characteristics: 1. Multi-level fixed battery card slot for measuring batteries with different specifications. 2. Measured battery various button batteries, AA, AAA, 9V square battery and rechargeable battery etc. 3. It can measure whether the battery is fully charged; 4. Small body and convenient to carry. 5. It is an essential tool in your life to help you measure your battery power. Specification: Size: Approx. 90 x 60 mm / 3.5 x 2.4 inch Package List: 1 x battery tester The color of the marking is as follows: Red (RE-PLACE or RE-CHARGE replacement): If the indicator shows this block, the battery under test must be replaced or recharged, which means the battery is essentially unusable; Yellow LOW: The battery is very low, but some devices can also be used. Green (GOOD): The battery is fully charged