With the Stix Switch 2-Pack your lighting options are endless. How? The Stix Switch features the ability to switch between red & white modes with a simple long press of the power button. So if you need extra light up front more visibility at the rear or a traditional front/rear combo the Stix Switch 2-Pack delivers. Headlight or taillight—you decide. A 2-pack gives you even more options. Press-&-hold for two seconds to shift between white & red modes. Fresnel lens for maximum visibility in all directions. Flexible mounting system works with handlebar & seatposts from 22.2mm up to 35mm in diameter as well as most seatstays. (Aero strap mount available separately). 340m Ah battery recharges via built-in USB (Universal Serial Bus) tab in two hours (no extra cables needed). White Steady mode: 65 lumens for 2:00 hours White Power Flash mode: 100 lumens for 6:00 hours White Eco Flash mode: 35 lumens for 16:00 hours Red Steady mode: 18 lumens for 2:00 hours Red Surge Glow mode: 16 lumens for 7:00 hours