The Caldwell Ballistic Precision Chronograph is a must have for a variety of shooters. Provides velocity readings from speeds of 5 to 9,999 fps within .25 per cent accuracy. Higher accuracy is achieved by using a high speed 48 MHz processors and calibrating every unit after assembly before it leaves the factory. The chronograph still remains simple to use, providing a readout of velocity in feet per second or meters per second on a large LCD screen. Please note: Chronograph Only.