Productparameter Name: neck putting fan Input: DC 5V/1A Size: 149*70*20mm Color: pink, white, blue Model: small eight Output: 5V/1A Capacity: 400mAh Power: 5W Accessories: small fan/charging cable/lanyard USB SMALL FAN INSTRUCTION MANUAL OPERATION METHOD: 1. Press the change evenly for the 1st time, and the first package will shipping 2 the switch again to begin the second one equipment 3 the change 3 times to begin the 1/3 instruments four the swap 4 occasions to close down MATTERS NEEDINGATTENTION 1. Please completely payment the product before using it 2. If it is not used frequently, please shop it and fee it every two months to bypass battery harm three use the designated 5V 1A charger and accepted accessoriesincluding charging line and charging head is strictly prohibited to use the charger with fast charging orinconsistent voltage 4 now not put this product into water or get wet or moist 5 no longer throw hit shake or shake this product in any other case it could trigger injury to inside precision components 6. Changing or repairing the product without permission could give up you from using the product usually and cause the guaranty to change into invalid 7 below 10 years old, please use under adult supervision