Lumina 525 bicycle light set. Delivers high tech lighting in a sleek package. Features a 180-lumen headlight and a 4-lumen taillight. The headlight is USB (Universal Serial Bus) rechargeable with the included cable, and the taillight is powered by (2) CR2032 batteries that are also included. Both lights use silicone straps for easy tool-free installation. Includes steady and flashing modes.