Impulse - BlackThe Impulse is the ultimate personal multi-task light!Powered by 2 lithium coin cells, the Ultrabright LED burns up to 36 hours and has 3 modes: low, high and flash.With its quick release clip and hat clip, you'll want one for each of your keychains and packs.Specifications:Power: 10 LumensLamp: 1 Ultrabright LEDBurn Time: 36 HoursBatteries: 2 - 2016 Lithium Coin CellWeight: .6oz or 17gWater Resitant: IPX4Warranty: 5 YearsWARNING: This product can expose you to chemicals including BISPHENOL A (BPA) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.