MOTION SENSOR, THE WAVE SWITCH - Simply wave your hand in front of the headlamp to turn the light on or off when it's on Sensor Mode. 4 inch / 10 cm sensoring range. LONG RUNTIME, BUILT IN 1200 MAH RECHARGEABLE BATTERY - Up to 10 hours runtime in white light, and 2.5 hours on high brightness. Red light is more energy saving with up to 30 hours runtime. WEATHER PROOF AND SHATTERPROOF - Reinforced body with an IPX4 water resistance rating. Can survive heavy rain and any impact in common outdoor activities and work conditions. DESIGNED FOR YOU - Ergonomic, lightweight (2.5oz / 72g), compact, rechargeable, the newly added travel case, and more. Our products are designed by the users for the users.