While out to gym this morning ,we stopped at Wal-Mart for a battery for Craftsman tractor. They are out of them?!? While back there, see new jump box. Our Harbor-Freight one is slowly getting worthless! I bought it for us. Thing is huge, guess it is 1000amp for firing big engines! Guess it will run 120V and has air compressor. It needs 36 hours for first charge so no play time yet!