The Cyclops HL4X Headlamp LED with Rechargeable Battery features an ultra bright CREE XP-G3 4W LED bulb with 4 color modes; white, red, green, and blue. The Cyclops HL4X also includes 4 lighting modes: High, Medium, Low, and SOS. It is constructed with a durable ABS housing with an adjustable headband. The HL4X is powered b a 3.7V/400mAH rechargeable battery and includes a USB charging cable.Warning: This product may contain chemicals known to the state of California to cause cancer and reproductive harm. For more information, visit www.P65Warnings.ca.gov.