Caldwell Ballistic Precision Chronograph Premium Kit with Tripod for Shooting Indoor and Outdoor MPS/FPS Readings SPECS: Each unit is factory calibrated to within +/- 0.25% accuracy and measures from 5 to 9,999 FPS EASE OF USE: Extra wide sun screens for added shading while outdoors, a large LCD display for easy reading, -20 threaded insert for tripod mounting and an included 15ft aux cord for transferring data to a smartphone or tablet VERSATILITY: Meters per Second (MPS) or Feet per Second (FPS) reading and is ideal for firearms, archery, airgun and paintball COMPATIBLE: App and Aux Data Transfer works with the following - iPhone, iPad, iPod Touch, Android 2.1 or newer smart phones and Kindle Fire Tablets