1. ac fan 2. frame size(mm):80X80X25 3. bearing:ball,sleeve bearing 4. voltage:120v/230v,50/60hz 5. max noise:27. ... arrival for ADDA AA8025 ac fan1Frame size(mm)80X80X252Bearing typeball bearing,sleeve bearing3Rated voltage115V/50,60HZ, 230V/50,60HZ4Rated speed1900~2800RPM5Max ... ohm between lead wire and frame(DC 500V)12Life Expectancy(Ball bearing)70000hrs min at 40 degree C/L10 relative humidity 65 ...