Bicycle Taillight Multi Lighting Modes USB Charge Led Bike Heart Shape Light Flash Tail Rear Lights for Road Mtb Bike Seatpost. Specifications: LED:COB/LED Battery: rechargeable polymer carp battery Battery life: 5 hours in high light mode, 32 hours in flashing alarm light mode Weight: approximately 25 grams Brightness: 10 lumens Size: length 59.5x height 28.5x28.5mm Feature: 1.Safe Night Riding: Are you still worried about night riding? The bright and flashing LED tail lights for safe riding. 2.Waterproof design: IPX-2 level life waterproof, allowing you to withstand wind and rain without sunlight. 3.Free adjustment: Five modes are available to create high-quality products with a unique and creative attitude. 4.Full battery: Long lasting, sufficient power supply, long lasting, no need to worry about the taillights running out of power. 5.Small body shape: Small and lightweight, portable, with powerful functions. Package Included: 1 x Bicycle Light 1 x USB Charging Cable 1 x Mounting Strap