What's in the box:

Andoer DR-E8 Dummy Battery with DC Power Bank USB Adapter Cable Replacement for LP-E8 for Canon EOS 550D 600D 650D 700D DSLR Cameras (Black)

Features:
USB port, plug and play, very convenient.
Need 5V 2A power bank, mobile power or charging plug (not included) for power supply, largely prolong the shooting time of your camera.
Suitable for Canon EOS 550D, 600D, 650D, 700D DSLR cameras.
Adopts multi-protection technology, such as short circuit protection, over-voltage protection and over-current protection, which ensures the absolute safety during use.
Cable length is up to 1.5m. Long enough, very convenient to put your own power bank or mobile power in your pocket or bag, or at somewhere else.

Specifications:
Brand: Andoer
Model: DR-E8
Compatible Camera Models: For Canon EOS 550D, 600D, 650D, 700D DSLR cameras
Input: USB 5V 2A
Output: 7.4V
Power Supply: Power bank, mobile power and charging plug (not included)
Protection: Short circuit protection, over-voltage protection and over-current protection
Cable Length: 1.5m
Item Weight: 50g / 1.8oz
Package Size: 12 * 11 * 1.8cm / 4.7 * 4.3 * 0.7in
Package Weight: 55g / 1.9oz

Package List:
1 * Andoer DR-E8 Dummy Battery
1 * DC Power Bank USB Adapter Cable

Note:
Please use 5V 2A(output) power bank/ mobile power for power supply, if not, the item can not work normally.