Specs: 3 LED battery meter with 6 settings Single button for easy on-and-off Design & Details: Built specifically for runners on the street or on the trail PowerTap(TM) Technology for quick switches between dim and full power IPX4 Stormproof to guard against rain and sleet Red taillight strobe for increased visibility on dark nights or early mornings Features digital lockout to avoid accidental usage Elastic headband with removable top strap and perforation for breathability Reflective Black Diamond(R) logos Tech Specs: Power: 500 Lumen Conveniently rechargeable lithium ion 1800 battery with micro-USB port AAA alkaline batteries also compatible