Couldn't find a datasheet.
DC12V, 3.90A
Made in China

When people hear "Delta fan", I guess this is what they think of. Its a good example of how older very powerful fans can still be very noisy even at low speeds. I think the efficiency improvements in newer highspeed fans also lead to them being quieter at low speeds Sanyo Denki 9GA1212P4G001 is a good example.