The professional battery state detection device can be used to detect button batteries, AA batteries, AAA batteries, 9V batteries, etc. Features: If you have more than one battery in your home, you can use this product to test them, so as to leave fine batteries and eliminate old ones. There are digital display type and pointer type for your choice. Easy and convenient to operate. Compact size for easy carrying. It is suitable for testing most household batteries. Specifications: Type: digital display type, pointer type (optional) Color: black Item size: 110 * 59 * 25mm / 4.3 * 2.3 * 1.0in Item weight: 45g / 1.6ounce Package size: 110 * 61 * 25mm / 4.3 * 2.4 * 1.0in Package weight: 51g / 1.8ounce Note: Package without battery. Packing List: 1 * Battery Capacity Indicator