Planet Bike Spok 50 USB rechargeable taillight.
High-output, surface-mounted LED provides 3 different modes
FL1 tested run times: 4.5 hrs. (steady at 5 lumens), 7 hrs. (Courtesy™ at 1.5–4.5 lumens) and up to 22 hrs. (Superflash™ at 5 lumens)
Side cutouts provide 270° of visibility
Dust and water resistance rated to IP54 standard
270 mAh lithium polymer battery charges in 2 hrs. with micro-USB cable (included)
Diminutive size and fast mounting rubber strap mounts to multiple mounting locations in seconds without tools