Specs: Output: 300 Lumens IPX Rating: IPX4 Max distance (High setting): 55 m Max distance (Medium setting): 35 m Max distance (Low setting): 8 m Display weight: 75 g (AAA), 69.5 g (BD1500) Weight without batteries: 42 g Design & Details: Powered with three AAA Alkaline cells (included) or the rechargeable BD 1500 Lithium-Ion battery and charger (sold separately) for maximum flexibility Settings include full strength, dimming, and strobe Brightness Memory allows you to turn the headlamp on and off at the last used brightness level without defaulting to max brightness IPX4 Stormproof construction can withstand rain and sleet Digital lock mode feature safeguards against accidental use when stored or packed