1.Material Inner materialinterval fabric,100% polyester Outer materialhigh quality textiles ,low air permeability ,72% nylon,28% polyester2.Weight about 500g, M size cooling vest (not including the draught fan)3.Power supply Lithium battery,Model 18650, 3 Monomer batteries4.Battery charging time about 2.5-3 hours5.Noise 1 grade-30dB-A;2 grade-36dB-A;3 grade-40dB-A6.The technical parameters of small draught fan 1).Electron3 grade air dampers controlling ( 1=low grade,2=middle grade,3=high grade) 2).LED light shows the battery condition3).Size144mm97mm29mm(widthheightdepth)4).Weight265g5).Work voltage12V6).Draught fan power 3.5W 7).Volume Air Flow(2 fans) 7.Washing instruction washed in 40C water temperature alone, avoiding dry-clean or ironingAdvantages1. Can keep cooling for long time Cooled by powerful Li-on battery, the vest can keep cool for 6 - 20 hours each time after being charged fully depending on the temperature you request.2. Long lifespan3. Light and easy to carry With a weight of only 500 g, the battery is very light and small. You can put it into your pocket easily.4. Adjustable temperature By setting the power level (1-3 grade) of the battery, you can set the airflow from 200litermin to 400litermin according to your request.5. Foldable and washable 6. Adjustable size
