The LED headlights are shock-resistant and low battery drain and feature a motion sensor. In sensor mode, simply place your hand in front of the light to light up. The main light white LED comes with red LED and red flashing functions. You can switch between steady on/off/red light on/flashing with the switch. Flyproof eyelashes that can be used even in the rain. Power supply: 3 AAA batteries (sold separately); Bulb used: CREE LED x 1 (cannot be replaced); Battery life (use alkaline batteries): Continuous usage time: Approx. 4 hours, Red illumination: Approx. 80 hours, Red flashing / Approx. 80 hours, Sensor operating range: Up to 3.9 inches (10 cm), Illumination: Approx. 200,000 lux Approx. 18 inches (50 cm). 00lux Approx. 39.4 inches (100 cm): Approx. 4,400 lux; External Dimensions (excluding rubber belt): Approx. 2.5 x 1.9 x 1.9 inches (63 x 48 x 48 mm); Weight: Approx. 2.5 oz (65 g).