This item is a universal battery checker tester AA AAA 9V and button cell battery. With it you can easily get the current volt of the tested battry, and know which batteries to keep and which to throw , place your battery between the of the battery tester, and the display will indicate that whether there is a battery need to be replaced. Great tool to check power level of 9V batteries. Features - Color: Silver - Material: Plastic - Size: 9.2x6.3x1.4cm - Note: Not Included Battery. - Three color indicates three different results: =Replace, Yellow=Low power, Green=Good. - Easy to read, colour coded meter indicates different power level. - Portable, easy to use. Just place your battery between the of the battery tester, and the will display the result. - ABS insulated plastic shell, light and convenient, easy to use. - With it you can easily get the current volt of the tested battry, and know which batteries to keep and which to throw . Package list: 1 x Portable Battery Tester