... fan frequency:50hz pcs/ctn:10 pcs 3,meas:810x315x610mm cbm:0.155 2 speed settings. use the three ways of clip fan ... ,wall fan and desk fan.1,we have many sizes desk clip ... life time .3,one year quality assurance.4,the fan motor is 100% brass .5,oem is accepted ... fan in school and office.7,free to adjust the angle,.8,the pole can rotate freely. mini table fan