1. Power: 1.9W/head
2. Transformer output voltage: 12V
3. Can clip the glass thickness: about 1.2cm or less
4. Power cord length: about 120cm
5. Size: 1 head: about 10.6 x 16 x 3cm, 2 head: about 20.3 x 16 x 3cm, 3 head: about 29.8 x 16 x 3cm, 4 head: about 39 x 16 x 3cm
6. Weight: 1 head: about 308g, 2 head: about 486g, 3 head: about 678g, 4 head: about 850g

Features:
1. Hanging way design, safe and stable
2. Two wind speed adjustable, according to the indoor temperature to choose the wind size, strong wind, cooling up to 2-4 degrees Celsius
3. Low-noise operation, does not affect fish activities
4. Adjustable width of the fan and the bracket up to 100 degrees, strong applicability, easy to install and move
5. Clamp mouth can be clamped 1.2cm within the thickness of the tank wall, to meet the daily use of fish tank
6. 12V safety voltage, to ensure the safety of the fan, safety insulation material wiring, to eliminate hidden dangers
7. Coil away from the water surface of the fish tank, will not cause a short circuit danger
8. Aluminum alloy bracket, durable, stronger bearing