This set features a built-in 350mAh rechargeable battery with 8 hours of high beam runtime. It includes a tool-free mounting system with silicone straps for handlebars and seat posts, fitting diameters from 0.8" to 1.4". Its dual light system offers multiple modes: headlight with High, Medium, Low, and Strobe; taillight with High Beam, Rapid Flash, Medium Beam, Emergency Pulse, Low Beam, and Slow Flash. The price drops from $19 to just $10.69. Shipping is free for over $35 or adds $6.99.