Feature: Wind Speed: 1-2-3, Neck fan, Low Noise, Rechargeable battery, Big Wind Use time, 5 hours work time Technical Specification Power: 3.5W (Max) Input: DC5 V OutPut DC4.2V Battery: Li-ion 18650 3.7V 2000mAh Working time: About 5 hours Charing time: About 3-3.5 hours Item size: 82.5*60*185mm Net weight: 150g Accessory: Charge cable, Manual 规格： 冰敷凉爽小风扇 功率：3.5W 电池:锂电池18650 3.7V 2000mAh 工作时间:约5小时 充电时间:约3-3.5小时 产品尺寸：82.5*60*185mm 产品重量: 150g 配件： 充电线，中英文说明书