The Caldwell Ballistic Precision Chronograph with Bluetooth Premium Kit is a must have for a variety of shooters from handloaders trying to optimize load data to archers and air gun enthusiasts. Ideal for firearms, archery, Airguns, and paintball. The chronograph will provide an accurate velocity reading from speeds of 5 to 9,999 fps within .25% accuracy. Caldwell achieved this level of accuracy by using a high speed 48 MHz processor and calibrating every unit after assembly before it leaves the factory. The chronograph also remains simple to use giving a readout of velocity in Feet per second or Meters per second on a large LCD screen. Extra wide sun screens are included for shading in full sun operation along with a 1/4-20 threaded insert on the bottom of the housing for use with a tripod (included). For shooters looking to fully take advantage of this chrono, capture shot velocity data via Bluetooth and record environmental conditions and load data in the Caldwell app. This app will display the velocity of each shot on the screen and record it with other data identifying the current load and environmental conditions during the shooting session. Other data calculated by the app include average velocity, standard deviation, minimum velocity, maximum velocity, and velocity spread for shot string. This data is stored and can easily be exported through email or SMS messaging or simply stored for recall on a later date. Take your shooting to the next level with the Ballistic Precision Chronograph by Caldwell. Includes: Chronograph (Connects to your smart device via Bluetooth). 2 sunshades Carry case Tripod Light Kit