LLT CC via Amazon offers the Ruitai LED Running Chest Light / GoPro Camera Mount for $29.99. Coupon code "F425L9DC" knocks that to $17.99. With free shipping, that's $17 off and the lowest price we could find. It features a chest light with three lighting modes (300-lumen maximum output), rear flashing safety light, adjustable elastic chest strap with camera mount (compatible with GoPro and other action cameras), and built-in rechargeable lithium battery with up to six hours of run-time per charge.