1、[Fast Cooling] Aquarium cooling fan outlet with 45 degree angle design, for the water surface cooling faster, the water surface can be quickly cooled. 2、[Compact And Beautiful] External wall mounted design of fish tank cooling fan, beautiful, small size, easy to install, does not occupy the space of the fish tank. 3、[Safe And Adjustable] This fish tank fan is designed with USB connector, safer to use, with switch at the bottom, you can adjust the wind speed according to your needs. 4、[With Timer] Aquarium fan with timer, can be connected as needed, easy to control the use time, four groups of mode cycle, just set once, automatic cycle every day. 5、[Easy To Use] Timer with a compatible socket at the bottom, easy to switch the conversion plug, high temperature resistance and no deformation, environmentally friendly and safe. Item Type: Aquarium Cooling Fan Material: ABS Size: Length: Approx. 18cm/7.1in, Width: Approx. 10.5cm/4.1in, Thickness: Approx. 4.6cm/1.8in Use: Fish Tank Refrigeration Fan, Cooling Fan Maximum Wind Volume: 13FCM Maximum Wind Pressure: 12 mmH20 Power: 4.5W Suitable for Tank Wall Thickness: ≤15mm/0.59in Suitable for Fish Tank: Approx. 30-60cm / 11.8-23.6in 1 x Aquarium Cooling Fan 1 x Power Adapter 1 x Timer