■ Understand your swing with precise numbers and analyze objectively for effective practice. Employs a radio wave compliant microwave sensor. Achieves high accuracy through the Doppler effect and extensive actual measurement data. Measures and simultaneously displays [Head Speed] [Ball Speed] [Estimated Carry Distance] [Smash Factor] Allows you to understand the carry distance of each club, which is important for score-making. Even those struggling with adjustable club settings can check the numbers to find the optimal setup. ■ Easy to Use No complicated setup required, just place it separately from your club. ■ Carry Distance Coefficient Adjustment When using range balls, adjusting the coefficient allows for the display of corrected values to match the carry distance of course balls. Power: Uses 4 AA alkaline batteries Battery Life: Approximately 2 weeks with 1 hour of use per day Body Size: 60(W) x 126(D) x 31(H)mm (excluding protrusions) Weight: 185g (including batteries) Operating Temperature Range: 0°C to 50°C I have used it at the driving range several times. Operation confirmed. ※ I am also listing other bargain items such as shafts, heads, and Masters pins. Please take a look!!