This smart baseball sensor is mini-sized and ultra lightweight, but it has powerful functions-- accurately transmit the swing data to your smartphone via BT4.0 connection, which allows you to replay and review your swing in 360 degrees from any angle. Through data analysis on the App, you'll be able to get instant feedback and measure the critical aspects of each and every swing, so you can improve your skill fast.<br><br><strong>Features:</strong><br>BLUETOOTH CONNECTIVITY: Bluetooth 4.0 connection with your smartphone, ensures steady, accurate data transmission and long standby time. It supports 3,000 strokes of data storage and off-line sports record. Suitable for iOS 8.0 or above, for Android 4.3 or above.<br>3D SWING SIMULATION: Built-in 3D swing simulation function, replay and review the video of your swing in 360 degrees from any angle and any direction.<br>SPORTS MONITOR: Real time track the bat speed, swing plane, bat angles and time at impact and all. It records your sports data, analyze your swing and success rate accurately.<br>MINI SIZE AND PORTABLE: The sensor measures 30mm*8mm and weighs only 6g, super lightweight and portable. Comes with bat mount and easily attaches to any baseball bat.<br>RECHARGEABLE &amp; LONG USE: The smart baseball sensor easily and fast charges by USB cable, only takes about 90 minutes to full charge, and it supports long working time up to 6 hours.<br><br><strong>Specifications:</strong><br>Diameter: 30mm / 1.2in<br>Thickness: 8mm / 0.3in<br>Weight: 6g / 0.2oz<br>Charging Time: About 90 minutes<br>Using Time: Maximum 6 hours<br>Package Size: 16.2 * 9.2 * 4.7cm / 6.4 * 3.6 * 1.9in<br>Package Weight: 207g / 7.3oz<br><br><strong>Package List:</strong><br>1 * Baseball Sensor<br>1 * Bat Mount<br>1 * USB Charging Cable<br>1 * Resetter