Voltmeter range: 0 to 5Vdc Supply voltage: 24Vdc Single flashing bar signals low battery energy reserve alert at 70% discharge Double flashing bar alerts for battery empty status at 80% discharge 10-segment tri-colour (5 green, 3 yellow, 2 red) LED display (stock no. 533-4229) or 10-segment backlit LCD (stock no. 533-4235) options Compact IP65 rated unit (front and rear) Compatible with Curtis motor speed controllers that feature Curtis Battery Discharge Indicator (BDI) output