On our head, puppy's shoulders, near our toes, we're constantly finding new places to wear this light. Weather resistant LEDs are visible up to 2400ft away, so we're always seen when in motion. Elastic strap adjusts to fit; flexible light mirrors our form. Rechargeable via USB, it lights up in red, blue or green, user's choice. Solid or strobe settings. Lasts up to 16 hours on strobe. 1¼"x½"x7". Catalog/web only.