The cb-625 is a compact chronoscope specifically designed for .177 and .22 airguns. The Combro cb-625 shown attached to the barrel of an air rifle. Ready to shoot. Pellet missed the second sensor.
Second sensor is blocked or damaged.
First sensor is blocked or damaged. Combro chronograph contains glass components in its display panel. Handle with care. If you do not think you can handle this chronograph safely, please do not use it.