sentences:  The US version of the board includes all firing modes and has a red power LED.This board can also be replaced with a number of aftermarket boards (such as Blackheart or Virtue boards) which offer greater control over the timing of the firing action, different firing modes, and a higher maximum rate of fire, in most cases limited only by the mechanical capabilities of the marker itself.Due to the large number of aftermarket upgrades available, the Ion can be customized or used stock to hold its own in today's fast-paced speedball tournaments.