Features:
Adopts premium light beads, bright with long service life, make your bike highly visible so that it can guarantee your cycling safety .
Excellent waterproof processing that ensures the safety of battery compartment, no need to worry about rainy days. 
With built-in battery, and supports USB charging, very convenient to use and energy-saving.
5 modes can meet your different needs, it can illuminate when you brake your bike to alert coming cars behind you.
With two quick release mounts, a rotatable bike mount for easy installation on bike seatpost, rear fork, and a clip mount for attachment onto backpack, clothes, etc.

Specifications:
Material: ABS+ PC
Color: Red
Light Bead: 4 LEDs
Mode: Steady, Fast flash, Slow flash, Rhythmic flash, ECO
Power Supply: Rechargeable 160mAh Battery (built-in)
Charging Method: USB
Charging Input: 5V 150mA
Working Time: About 9.5hrs
Waterproof: Rainproof
Size: Approx. 5.5 x 5 x 2.5cm / 2.16 x 1.97 x 0.98inch
Weight: Approx. 76g

Packing List:
1 x Bike Warning Light

1 x Clip Mount

1 x Bike Mount
1 x Manual