Ride safe and be seen at night with the Topeak Headlux DUAL USB high-performance helmet light. Innovative double sided helmet mounted light shines white facing forward and red towards the rear and features 4 LEDs for excellent visibility. Rubber straps provides easy installation and flexible mounting options on helmet.Compact dual-sided helmet light with high-power leds helps keep you be seen from in front and behind. Also mounts to the bottom of drop handlebars.Output: 140 (front), 10 (rear) lumenslamp: 2 white (front), 2 red (rear) high power led'sbattery: 3.7v 680mah lithium ion (integrated)burn time: 3.3 hr (high), 5.5 hr (middle), 33 hr (blinking), 28 hr (front: middle, rear: blinking)charge: micro usbcharge time: 2 hr approxlamp housing: injection molded polymerstrap mount fits helmet / bottom of dropbarsipx 6 waterprooflow battery indicator6.9x4.4x2cm40g