Features: USB Powered,no external power required. With key switch. Super mute. USB transformer can be purchased on its own power supply,the proposed purchase of 5V, 1000MA transformer above. Personalized multi-color options. Color:Black. Package include: 1 x PC USB Cooler Cooling Desk Fan Please note: 1> niceEshop(TM) is a registered trademark and the only authorized seller of niceEshop branded products. 2> niceEshop provide you various kinds of great products at the lowest possible prices, welcome to our store and get what you want !!! 3> niceEshop highly appriciate all customers" opinions to improve the selling ,also if anything you unsatisfied, pls contact our customer service department for probable best solution.