Description: - Fresh air, naturally release the fresh wind, so you can enjoy it when you work, sleep and go out. - Moist the air, which can make your breathing smoother and sleep more comfortable. - Strong wind, low noise fan, big suction to stir the surrounding air, strong and strong wind. -Supply of fresh air, wide ranges of wind, rapid cooling, refreshing summer. -Ultra-quiet, high wind force, 360 degree multi-angle air supply. -Four-speed wind adjustment, from gurgling natural wind to strong wind blowing and diverging, you can choose as you like. Specifications: Signal to noise ratio: 50dB Frequency response range: 200Hz-16KHz Theoretical power: 8Ω 4W Input voltage: 5V Input current: 800mA Battery capacity: 4000mAh Use time: 5-20 hours Charging time: 2-3 hours Material:ABS silicone Product weight: 280g Product size: 161 * 137 * 87mm Color: Mint green, cherry blossom powder Package Included: 1* electric fan 1*Data cable