Description 1.USB mini flexible fan with LED light and runtime 2.Plug and play， no external power supply is needed Power supply DC 5V direct from the USB port 3.It can test temperature or runtime 4.Keep fanning until you unplug the USB fan or turn off the notebook or PC 5.Gentle Ray， Bright， with or without frequency change， benefit from preventing eyesight 6.Power saving design: low power consumption 7.Durable soft fan blades make you free of injury 8.Gently adjust the flexible neck of USB fan to position the breeze anyway you9.LED Emitting color: 10.Time Clock: Green Number and Red Pointer Feature Product Length: 40 cm Working Volt: 5 V Working current: ≤350 mA