SUPERFIRE BTL01 620nm Wavelength USB Rechargeable Bike Cycling LED Tail Light Waterproof Bicycle Warning Rear Lamp

• It's small and light, can be easily attach to the rear of the bike, helmet, backpack, etc.
• 4 modes adjustable: half brightness/fast flashing/slow flashing/full brightness
• IP44 waterproof level, can be used normally in rainy days
• With built-in 230mAh battery, about 4.5 hours of using time
• Easy to install and remove

Specification:

• Light source: 5*2835 LED
• Wavelength: 620nm
• Power: 1W 
• Weight: 20g 
• Material: ABS 
• Size:70*30*30mm 
• Power source: Built-in polymer battery(230mAh)
• Runtime: 4.5H
• Charging time: 0.5H
• Waterproof: IP44
• 4 Modes: half brightness/fast flashing/slow flashing/full brightness