Features:

Usb interface/EU Plug, simple and convenient operation
Ultra-thin design, saving space
Reduce water temperature and drop up to 2 ~ 4℃
Offer a couple degrees cooling to offset lights and UV filter
2 variable speeds, stable and strong clamp
Easy installation  No assembly required 

Description:
During summer, the aquarium tank easily gets hot enough to cook fishes. smart cooler kit can reduce aquarium water temperature up to 2 to 4℃, and can also offer a couple degrees cooling to offset lights and UV filter. 2 variable speed 

Notes:
1. Make sure the thickness of your aquarium wall (or the width of the lip around the aquarium top edge) ≤9mm for usb interface. Aquarium wall≤15mm for EU plug 
2. No worry about the adapter outlet. We notice your concerns and the adapter is as shown in the image.

3. Be careful and don't push too hard when installing in case of damage to the aquarium and cooling fan.

ATTENTION :usb header is not included

Package includes: 1pcs USB Interface Aquarium Cooling Fan/EU Plug Aquarium Cooling Fan