Color: White Quantity: 1 Material: Plastic Emitter type: LED LED quantities: 11Fan blade quantities: 2 Interface: USB 2.0 USB cable length: 100cm Compatible with USB 1.1 and USB 2.0 USB interface 5V of direct power supply, environmental and energy-saving design, with 250mA power consumption Plug and play, only need to insert USB port and press the switch to power on Fan blade with LED luminous software board, can showing advertising words or pattern when rotation. And make the unique advertising text, letter, Arabic numbers and patterns according your requirement; Supports 6 paragraphs of different contents, 16 characters display for per paragraph Multi types of displaying advertisement: From left to right side or from right to left side verbatim display Programmable IC fan, directly connected computer the change the content, memory capacity up to 2KB (Chinese words up to 200, English words up to 400), theoretical rewrite times up to ten thousands. Current less than 0.5A, power less than 0.25W Environmental temperature: -10~40'C Packing list: 1 x USB fan 1 x USB cable (100cm) 1 x CD