SHANREN USB Rechargeable Bike, Helmet, Warning LightsFront or Rear LED With 4 Steady & Flashing Modes (Mount Strap & USB Cable Included) SAVES BATTERIES & ENVIRONMENT: The convenient USB charger lets you power up these bicycle lights hundreds of times without constantly buying new & disposing of batteries. BUY ONLY WHAT YOU NEED: Because the headlight (white) and taillight (red) are sold separately, you can purchase just the bike lights you need with no added expense 4 MODES FOR OPTIMAL SAFETY: With the push of just 1 button, you can cycle through bright solid, dim solid, flashing, and SOS MOUNTS / UNMOUNTS on ANY Bike in 10 Seconds: The universal strap simply wraps around any bike handlebar and snaps into place. Take it with you using the built-in belt hook. WATERPROOF & SHOCK RESISTANCE