Nothing says “see me now” louder than a strong & bright taillight both for day or nighttime use. With its spherical lens which directs lumens more than a 1/2 mile (800m) in the brightest California sun the Stix Elite taillight is the go-to taillight for our infamous Lunch Ride. It’s all about peace of mind really & with its six light modes you get multiple options for day or night visibility. & depending on the chosen mode this taillight will run for up to 77 hours & it’s easily charged via built-in USB (Universal Serial Bus) tab which eliminates the need for a cable. Dome lens concentrates output from CREE XBD P4 center LED for 1/2 mile (800m) visibility in the brightest sun. Fresnel lenses for secondary LEDs provide wide angle visibility. 540m Ah battery recharges via built-in USB (Universal Serial Bus) tab in two hours (no extra cables needed). Flexible mounting system works with all round seatposts plus its compatible with most seatstays (Aero strap mount available separately). Steady High mode: 50 lumens for 2:30 hours Steady Low mode: 18 lumens for 9:00 hours Power Surge mode: 37 lumens for 8:30 hours Power Flash mode: 100 lumens for 10:00 hours Disco Flash mode: 40 lumens for 22:00 hours Eco Flash mode: 12 lumens for 77:00 hours Red/ Green battery charge level indicator.