What's in the box:

Cycling Bike Taillight USB Charging MTB Road Waterproof Rear Bike Light Flashlight (Standard)

Scientific design, 180 full-range warning, 14 LED beads, is a fine companion for night riding.

Features:
Lightweight for easy to carry, and convenient to install and uninstall.
IPX4 waterproof and dustproof, all around shield on joint, prevents rain from every direction.
Charging quickly and conveniently, with a rechargeable USB cord to charge from any device with USB port
Five modes to meet your different purposes
High brightness LED for high visibility at night.

Specifications:
Material: PC
Waterproof: IPX4
Surface treatment: anodic oxidation
Product lamp bead: 14 LED
Product battery: 300mAh
Item size: 37 * 34 * 23mm / 1.5 * 1.3 * 0.9in
Item weight: 30g / 1.1ounce
Package size: 57 * 54 * 43mm / 2.2 * 2.1 * 1.7in
Package weight: 40g / 1.4ounce

Packing List:
1 * Bike Taillight