The Dorcy Pro Series 335 Lumen Headlamp runs on 3 AAA . The LED Headlamp is designed for comfort and convenience with its adjustable elastic strap, providing hands-free illumination. This multi-functional headlamp boasts super bright LEDs, offering an impressive 335 Lumens on high mode and 180 Lumens on low mode. Additionally, it features a color-changing LED in red/green.With its compact and weather-resistant design, this headlamp is ready for any situation. The top-mounted push-button switch ensures easy operation, and the headlamp provides a runtime of 5 hours and 30 minutes. Complete with 3 AAA cell batteries, the 3AAA - LED Headlamp is your perfect companion for various activities, from outdoor adventures to everyday tasks.