VOICE CADDIE Golf Swing Caddie Standalone device (no phone app needed) Instant feedback via LCD display. Measures Carry Distance, Swing Speed, Ball Speed and More! Portable Launch Monitor. Refer to the PDF attached below in Technical Specification for User Manual. Standalone device (no phone app needed) Features: Carry Distance, Swing Speed, Ball Speed and Smash Factor 3 Modes: Practice Mode, Target Mode and Random Mode Daily & Overall average stats for each club Easy use with remote control