Features:
Click the button to enter normally on mode: weak light - medium light - strong light - Off (click to switch);
Double-click the button to enter flash mode: low flash light - medium flash light - strong flash light - off (click to switch);

Specifications:
Material: ABS plastic, CNC aluminum alloy (with heat dissipation function)
Color: gold aluminum alloy edge
Battery: rechargeable lithium battery (3.7V, 500mAh)
Weight: about 70g

Package Content:
1 x COB Bicycle Taillight
1 x USB Charging Cable
1 x Bracket
1 x Strap