Features: 1) Light performance: a) 21 extremely bright white LED lamps b) Burn time 24 hours (Alkaline) c) LED lamps will last more than 100,000 hours 2) Body: a) Aluminum body b) Anodized for improved corrosion resistance c) 1.42" (36mm) diameter x 3.72" (94.5mm) length 3) Power source: powered by 3 AAA batteries (not included) 4) Operation: a) Constant ON/OFF via twist-activated switch end b) Push switch on the bottom 5) Finish: black, aluminum and titanium