Black Diamond Sprinter 500

Black Diamond Equipment says:
Dual-Fuel: Maximum flexibility to utilize either the rechargeable lithium ion BD 1800 Battery (sold separately) or Alkaline cellsRechargeable 500 lumen headlampMicro-USB port included on rear battery compartment for easy rechargingRed taillight strobe with on/off programmability for increased visibilitySix-setting 3 LED battery meterVariable dimming and strobe modePerforated elastic headband with removeable top strapIPX4: Storm proof-Tested to withstand rain and sleet fromRechargeable 500 lumen headlamp | Black Diamond Equipment Sprinter 500 Headlamp, in Ultra Blue