Thank you for viewing. I purchased this item but did not use it, so I am listing it for sale. Swing Revolution! Check the impact with numbers! By attaching it to the FBT-351 Swing Partner, you can easily measure the impact of your swing. Easy installation, just attach the sensor with a rubber ring. Equipped with three modes, improving the quality and motivation of your practice swings! ■Size: Width 9.3cm x Depth 8.5cm x Height 12cm ■Weight: 135g (including batteries) ■Material: ABS ■Power: 3 AAA batteries (sold separately) FACAD-100 AC adapter (sold separately) ■Country of Origin: China Search words: Training equipment, practice equipment, training supplies - Brand: FIELD FORCE - Model Name: Portable Batting Machine - Size: Compact - Color: Black - Features: For batting practice Thank you for viewing.