Bike Light ThorFire Bike Tail Light, Ultra Bright Bike Light USB Rechargeable, LED Bicycle Rear Light, Waterproof Helmet Light, 5 Light Mode with Red & Blue Light Fits on Any Road Bikes;

High Brightness & 5 Mode
Red brightness( runtime up to 2 hours)
Red Strobe( runtime up to 4 hours )
Blue brightness( runtime up to 2 hours)
Blue Strobe( runtime up to 4 hours )
Red/Blue Strobe (runtime up to 3 hours)

USB Rechargeable
Bulit in high quality rechargeable lithium battery, using the most convenient USB charging mode, only takes about 2 hours to fully charge.

Easy To Install And Remove
Can be mounted vertically or horizontally
Quick release rubber strap handle bar/seatpost mount(fits 12-34mm)

Specifications:
LED Color: Red, Blue
Battery capacity: 500mAh
Charging time: 2 hours
Dimension: 3.4''* 1.6''*4.7''

Package Inlcude：
1 x USB Rechargeable Rear Bicycle Light
1 x Rubber Strap
1 x USB Charging Cable.
Note:USB Wall Charger( NOT included )