Used EASTON B5, Pro Big Barrel 3 BBCOR Baseball Bat, 2 5 8" 2021 ATAC Alloy 31 28 31 28:Silver Green Countdown Timer: Can be set 12":Black Countdown Timer: Can be set for distance or time Heart Rate Monitor: The cycling heart rate monitor features a strap coded specifically for each individual computer Wireless Cadence Sensor: For accurate tracking of revolutions per minute Batteries Included: For all components Automatic Start Stop: The monitor automatically starts when exercise begins and turns off 4 minutes after exercise stops Missing Items: 2 AAA Batteries Magnet Round handlebar mount 2 Zip Ties Not Included The bat improves a hitters swing speed and allows for added barrel flex The top rated Advanced Thermal Alloy Construction (ATAC Alloy) from Easton is going to be featured on this bat They have also decided to add different wall thicknesses to the barrel to allow it to have a very long sweet spot