Easy to Use: identify battery status simply by the analog display needle, "good" (green), "low" (yellow), and "replace/recharge" (red). Easy to Operate: Activated by the battery under test, so no battery is required for operation, adjustable slide control, the battery tester is compatible with most batteries and coin cells. Precise Data: Digital battery tester is faster and more accurate than ordinary battery tester, no waiting. Easy to Carry: Simple but effective little battery tester checker , compact size and lightweight,easy to carry. Multiple Uses: Can be used to test different types of household batteries, such as AA, AAA, C, D, 9V, 1.5V, Button Cell Batteries. Model: BT-168 Size: 11 6 2.5 cm Battery Size: 1.5V | 9V Good: 1.5V - 1.28V| 9V - 7.8V Low Power: 1.27V - 1.15V| 7.7V - 6V Replace: Below 1.15V| Below 6V Package includes:1pc Battery Tester