The luminaire operation is SA type. That is, in the presence of voltage the luminaire does not operate in emergency. With 100 VAC 277 VAC supply. The Lighting LEDs can be switched on / off with the manual switch. If the yellow LED is on and the green LED is off, battery is charging. If the green LED is on and the yellow LED is off, the battery is fully charged. If the red LED appears steadily, it means that the battery is below 90 minutes of autonomy and you have to change it. Without 100 VAC 277 VAC power supply battery maintains Illumination LEDs lit less brightly. The manual switch is not operational. Certificates EC, UL1598CSA(E362733UL924CSA(E362874),RoHs.