Planet Bike Spok 50 USB rechargeable taillight.

Features

• High-output, surface-mounted LED provides 3 different modes
• FL1 tested run times: 4.5 hrs. (steady at 5 lumens), 7 hrs. (Courtesy at 1.54.5 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
• 25 grams