Caldwell, Precision Chrono Kit, Chronograph, BlueTooth Enabled, Extra Wide Sun Screen, Green, Includes 2 Sun Screens, Carry Case, Tripod, Light Kit NEW Ideal for firearms, archery, Airguns, and paintball Calibrated to +/- .25% Accuracy Bluetooth Technology Pairs with Caldwell App Includes Carry Case, Tripod, and Light Kit Product Description Whether your testing load accuracy, monitoring the speed of your arrows, or ensuing your paintballs are within field regulation, the Caldwell Ballistic Precision Chronograph is the ideal tool for accurate velocity measurements.