REVOLT 350 HEADLAMPOur ultra versatile, IPX4, USB rechargeable headlamp that runs on the modular new Black Diamond 1800 rechargeable battery or standard AAA batteries, the redesigned ReVolt 350 now is now lighter, brighter, and smaller, boasting 350 lumens of light, an updated user interface, and a multi faceted optical lens design that saves battery life. FEATURES Rechargeable 350 Lumen headlamp Sleek, low profile design uses new BD 1800 Rechargeable mAh Lithium Ion