EnduroSolid State power regulation provides maximum light output throughout battery life Securely clips to the visor of your hat for convenient, hands free use Multi function push button power switch At only 2. 75 ounces with batteries, this headlight uses (2) 1. 5V AAA batteries for a combined performance at the top of the sub compact headlight category. The Enduro has been specifically engineered to minimize the weight and maximize run time. The light's