Whether you're testing load accuracy, monitoring the speed of your arrows, or ensuring your paintballs are within field regulation, the Caldwell Ballistic Precision Chronograph is the ideal tool for accurate velocity measurements. Capture shot velocity data via Bluetooth and record environmental conditions and load data in the Caldwell app. FeaturesFACTORY CALIBRATED TO +/- 0.25% ACCURACY, CAPTURES VELOCITIES FROM 5 - 9,999 FPSIDEAL FOR FIREARMS, ARCHERY, AIRGUNS AND PAINTBALLEXTRA WIDE SUN SCREENS FOR ADDED SHADING IN FULL SUN CONDITIONSCONNECTS TO YOUR SMART DEVICE VIA BLUETOOTH