ROCKBROS A54 USB Rechargeable Bike LED Tail Light Waterproof Bicycle Cycling Warning Rear Lamp - Black

• It's small and lightweight, can be easily attached to the rear of the bike
• Durable and waterproof, can be used normally on rainy days
• High brightness, multiple lighting modes, enhance night cycling safety
• The black type is single red light, other two types have three light colors
• With built-in battery, charged by USB cable

Specification:

• Size: about 15*80*23mm
• Weight: about 64g