Voltage output DC3-6V. Independent compact Emergency LED Driver.Suitable for LED Ceiling light & Tri-proof light.Each variant has controlled current SELV compliant outputs,built-in adaptability that allows for optimum output current based on the forward voltage of the specific light engine for a more precise match to the controlled LED scheme.The range includes options for Zigbee Self Test with a LiFePO4 battery to drive 3-hour rated emergency duration.