Two-speed wind control, depending on the indoor temperature, reduce the water temperature, up to 2~3°C The adjustable jaws can clamp the tank wall within 1.2cm of thickness, which can meet the daily use of the fish tank Large 12V safety voltage cooling fan with high safety standards to ensure fan safety Adjustable Angle: Adjustable fan and bracket width up to 100°, easy to install and move material: plastic The appearance is elegant, beautiful and generous. Wall-mounted design, easy to use, safe and stable. Applicable: So the fish tank with glass thickness not exceeding 12mm 3. Using DC12V direct current, safety guarantee 4. The coil is far away from the water surface of the fish tank and will not cause the danger of short circuit Size: 20.3CM×16CM