The product can directly connect to the USB port of laptop or desktop.<br />You can enjoy a refreshing and pleasant feel while sitting at the desk. <br />Material: Plastic<br />Fan Blade Dimension: about 4 x 3.5 cm<br />Product Max Length: about 30 cm<br />Power Supply: PC provides DC 5V power via USB connection<br />NO Battery Required <br />1 X Fan <br />In original package<br /><img src="http://img6.eachbuyer.com/x21/p15/br295_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x21/p15/br295_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x21/p15/br295_3.jpg" />