Perfect Emergency Solution For LED fixtures with external drivers, this emergency driver is great to have and can be used on most fixtures that operate on DC 3-60V. Durable Power Supply In the event of a power outage, this emergency backup battery driver can provide over 90 minutes of emergency lighting to connected LED luminaires after being charged for 24 hours. Wide Application This driver supports 120V-277V US commercial wide-voltage input. This emergency device is ideal for use in hospitals, offices, schools, universities, shopping centers and other public buildings. Flexible Usage This driver is suitable for LED lamps with a wattage less than or equal to 40W which have external drivers, such as linear lights and panel lights. Satisfaction Guaranteed This UL-listed driver meets US electricity standards, assuring it's safe and reliable. It also comes with a 2-year warranty, fully protecting your rights and benefits as a customer. Note Pressing the TEST SWITCH turns off the light and forces the unit into emergency mode, interrupting power to the designated AC driver. After releasing the TEST SWITCH, the fixture returns to normal operation after a momentary delay. This driver is not suitable for damp location, please use it in room. Input voltage: 120-277VAC Output voltage: 3-60VDC Wattage: 4W Wattage of compatible luminaires: ≤40W Working temp: 32℉-122℉ Color: White Material: Metal Charging time: About 24 hours