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Mini USB Powered LED Cooling Fan• Gently adjust the flexible neck to position the cool breeze any where you wish. • USB port powered, no external power supply needed.• Durable soft fan blades for safe usage.• No dirve, plug and play.Product parameters:Working Volt: DC 5VWorking current: ≤350mASetting the time:√ Plug into a USB port and press the ON/OFF switch to turn fan on and to activate the clock display.√ Press and hold the ON/OFF button until minute hand starts blinking.√ Setting the hour hand:continue to hold ON/OFF button to set the hour hand.The clock will spin clockwise fast,release the button just before the correct hour.√ Setting the minute hand:After the hour is set,the minute hand will flash,Click the ON/OFF button to move the minute hand forward to the correct time.√ Leave for 6 seconds and the time is set.Warranty:Every Product includes 45 days money back & 18-month warranty! Thank you for your purchase of our products, if you encounter any problems in use you are welcome to contact us at any time, we will always be customer satisfaction as the direction of our efforts, once again wish you happy every day!