Waterproof LED Headlamp in Black 277 lumens at 4 hrs; 133 lumens at 9.5 hrs; 55 lumens at 25 hrs; 4 lumens at 205 hrs; strobe at 277 lumens; SOS at 55 lumens 154 meter visability IPX-6 waterproof Includes diffuser lens Uses four 1.5V AA (Ni-MH, Alkaline) batteries