Three drivers are capable of powering high current LEDs (or LED arrays) up to 500ma each. The drivers sink to ground and can be used for other applications if desired. The header connector has two pins for each output and a current limiting resistor set for 10ma per LED. The LEDs are powered by the on-board 7.0V supply. This consistent 7V over the entire battery voltage range keep the LEDs at a constant brightness even when battery voltage drops.