What's in the box:

LED Bike Tail Light Bicycle Rear Lights Rear Safety Cycling Light for Bicycles, Camping, Backpacks, Hiking (Red)

Features:
Safe Night Riding Design: This bicycle light is very suitable for night riding. It is easy to install, the light is bright, which is easy to attract people's attention.
3 Light Mode: The Taillight features an one-touch switch with 3 different lighting modes, including Fast, Slow, and Steady.
Waterproof: This Waterproof safety light can be seen in Any Weather day or night.
Easy Installation: The mount straps are designed with openings, so it can tightly fit around many size seat posts, handlebars, seat risers, backpacks, helmets and keep lights secure and firm.
Multi-functions: Perfect for outdoor activities like Hiking, Camping, Cycling at night, or as an Emergency Flashlight.
Powered by 2 * AAA batteries.(Not included)

Specifications:
Name: Bike Light
Power source: 2 * AAA lithium batteries (Not included)
Lighting mode: Fast, Slow, and Steady
Material: Aluminum alloy + plastic
Light color: Red
Shell color: Red, White(optional)
Package size: 10*8*8cm
Package weight: 100g

Package list:
1 x Bike Tail Light
1 x Installation Bracket