LED IndicatorsCharging LED- Quick check for green light confirms chargingCharge Stage- Displays charging stageEqualize LED- Indicates the charger is currently in equalization modeFan Mode- Indicates charger\'s internal fan modeCharge Output- Displays the percentage of output current for each battery. Will also indicate maximum output setting when maximum output is adjusted to accommodate for AC source limitations.Alert- Icon LEDs provide warning and alert status for quick diagnosticsFour Control ButtonsFan- User adjustable settingsDim/ Alarm- Provides adjustment to brightness of LEDs on display as well as Silence function for alarms.Output- User adjustable charger output when AC source limitations exist that require lowering the AC current draw.Power- Places P12 Battery Charger into standby mode