Queshark Rechargeable LED USB Mountain Bike Tail Light Taillight MTB Safety Warning Lamp The new high-quality bicycle lights, lamp beads for high brightness LED material. Rechargeable polymer lithium battery - Luminance: 15LM (low power consumption and durable service). USB rechargeable bicycle taillight and auto cut off when fully charged. O-ring strap suitable most bike cube(12-32mm) ---- Modes: Long bright/Slow flashing/Shun flashing/Strobe. Waterproof Usb Rechargeable Flashing Night Rear Tail Flashlight Warning Cycling Bicycle.