Golf Swing Training Device Easy to Use! Just place it one club length away. No complicated setup required. You can easily use it with any club. Simultaneously displays "Head Speed," "Ball Speed," "Impact Efficiency," and "Estimated Distance" on one screen. You can understand your swing with accurate numbers and practice effectively, leading to score improvement. You can easily check impact efficiency, which could only be measured with expensive measuring devices. Accessories: USB connection cable (approx. 30cm) (1) Angle adjustment bracket (1) AC adapter (1) Instruction manual