Product name : Retractable Fan Product model : ION LUX IL7 Main Material : Aluminum alloy & ABS plastic Cell Model : 3.7V 7200mAh Product size : 197*197*93 mmfolded Implemention Standards : GB 4706.27-2008 Working Time : 5-24 hours Charging Time : 4.5 hours Noise Decibel : 30-40db Discharge Power : 1.3-4.8 W Charging Voltage : DC 5V/2A Working Wind Speed : 2.3-4.0m/s