The Master Chronys have the same capabilities as their counterpart except they come with LCD screen that can be put right up on the bench with you away from the bullets path and it also replaces the need for a remote control. Gives numbered shots Velocity stays on the display until next shot is fired Uses 9 Volt Alkaline Battery with 48 hours of continuous use Stereo Jack for optional remote or printer ONE String, from 2-32 shot memory Measures High, Low and Average Velocities, Extreme Spread and Standard deviation Change from FPS to M/sec Retrieval of individual shot velocities and statistics Delete individual shots from memory (automatically adjustment of statistics)