The Specialized Stix Switch Headlight/Taillight is a true two-in-one light and can be used either a white front light or a red rear light. Simply press and hold the button and you can go from a bright red taillight to a simple white headlight in seconds. Increase visibility and flexibility with the Stix Switch. With up to 100 lumens of power and up to 20 hours of run-time the Stix Switch makes for a perfect emergency backup light or addition to your regular commuting setup, Features Headlight or taillight—you decide. Press-and-hold for two seconds to shift between white and red modes. Three white modes including: Steady (65 lumens), Power Flash (100 lumens), Eco Flash (35 lumens). Five red modes including: Steady (18 lumens), Surge Glow (16 lumens), Power Flash (30 lumens), Disco Flash (15 lumens), Eco Flash (8 lumens) 2- to 20-hour runtime. Fresnel lens for maximum visibility in all directions. Charges in the USB port of any laptop or phone charger in two hours (no extra cables needed). Flexible mounting system works with handlebar and seatposts from 22.2mm up to 35mm in diameter, as well as most seatstays. (Aero strap mount available separately). Red/Green battery charge level indicator. Additional mounting options available separately.