YUPITERU Swing Trainer, Both Handed, Yupiteru GOLF GST-7 BLE Body Size: 124mm(D) x 60mm(W) x 18mm(H) Body Weight: 110g Usable Time: Approximately 10 hours when fully charged Charging Time: Approximately 3 hours Head Speed Measurement Range: 10.0 ~ 99.9 m/s Ball Speed Measurement Range: 15.0 ~ 99.9 m/s (When using a putter: 0.5 ~ 15.0 m/s) Smash Factor Measurement Range: 0.10 ~ 1.80