The Specialized Stix Sport Combo package contains a bright, 95-lumen headlight & 18-lumen tail light. These lights are perfect for commuting & riding around town when you need to be seen, rather than see where you are going. Both front & rear lights feature the versatility of six light modes, ranging from steady & strong to flashing & brilliant. They also feature wide-angle beams that can be seen from multiple directions, plus the convenience of USB (Universal Serial Bus) charging. Features Headlight: 35 to 95 Lumens output. Headlight: 1.35 hours to 13.5 hours runtime. Tail light: 7 to 18 Lumens output. Tail light: 2.5 hours to 23 hours runtime. Charge in the USB (Universal Serial Bus) port of any laptop or phone charger in two hours (no extra cables needed). 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) Six modes including: Steady High, 70 Lumens (White), 16 Lumens (Red) Steady Low, 35 Lumens (White), 7 Lumens (Red) Power Surge, 70 Lumens (White), 16 Lumens (Red) Power Flash, 95 Lumens (White), 18 Lumens (Red) Disco Flash, 35 Lumens (White), 7 Lumens (Red) Eco Flash, 35 Lumens (White), 7 Lumens (Red) Red/ Green battery charge level indicator. Additional mounting options available separately.