【BestGO】1.55V 3V Button Cell Checker Tester Watch Repairing Tool - intl
- When the pointer point at red district, indicate the is in a low power condition, you need to replace;
- When the pointer point at yellow district, indicate the is in a using condition, you can still to use it;
- When the pointer point at green district, indicate the is in a good condition, you needn't change
