Rechargeable Power Station For Use With Heater Fiber-Filled Composite & Single Wheel Metal Pitching Machines. DESIGN & DETAILS: Eliminates the Need For A/C Wall Power At Field Digital Display For Easy To Read Remaining Battery Life Includes Charger For Easy Recharge Light Weight At Only 6 lbs. SPECS: 300 Watt Inverter (Peak 600 Watts) 60 Amp Hour Battery 9" x 9" x 4" COMPATIBLE: Power Alley 360 Lite Baseball Machine Slider 360 Lite Machine Power Alley Pro Machine BaseHit Machine Power Alley 360 12" Softball Machine