Battery Included: Yes - This mini powerful comes with a battery included, ensuring that you can using it right out of without the hassle of purchasing a separate battery. Ideal for maintaining the perfect temperature in your fish tank. High-concerned Chemical: None - Safety is with this USB fish tank cooling fan, which is free from high-concerned chemicals. This makes it safe for both the environment and your , ensuring peace of mind and a healthy habitat for your fish. Fast Cooling and Heat Dissipation: Equipped with advanced cooling technology, this USB fish tank fan reduces the temperature in your aquarium. Its efficient heat dissipation mechanism prevents overheating, ensuring a comfortable environment for your . Mini Powerful Fan with Speed Regulation: Despite its compact size, this fan is incredibly powerful and features speed regulation. This allows you to adjust the airflow according to your needs, providing flexibility and optimal cooling for different tank sizes and conditions. Color: As Shown Material: PC Package Contents: 1*Usb Fish Tank Cooling Fan Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.