These luminaires are used indoors (ta 40 C) where emergency light is needed. Each luminaire must be permanently connected to the mains power supply. In normal operation the battery is charging, the green LED and 2 yellow LEDs light in non-maintained operation. The green LED and the LED strip light in maintained operation. In case of a mains power supply failure the luminaire will light the LED strip automatically in emergency mode. When the mains power supply is restored the device turns to normal operation. Non-maintained / maintained operation. There is an option to select the non-maintained or maintained operation by placing the jumper to the appropriate place. 2 Mounting Springs included for installation. Model: GR-312/15L/A Operating Voltage: 220-240V AC/50-60Hz Power Consumption: 3.4W/3.6VA BATTERY PROTECTION: From overcharge and deep discharge INDICATIONS: Charge indication LED CHARGING TIME: 24 Hours MINIMUM AUTONOMOUS DURATION: 3 Hours OPERATION TEMPERATURE RANGE: 5 to 40 C RELATIVE HUMIDITY: Up to 95%