1Threespeed wind speed can easily adjust the required air volume to meet your various needs. 2The antiskid strip at the bottom increases the friction and effectively reduces the noise when moving. 3Independent water tank, ice cubes can be added, and the air curtain can be adjusted up and down to realize heat dissipation in different directions. 4Suitable for office, home, dormitories, kitchen, bedroom and other entertainment places. 5Negative ion purification can effectively remove odors, purify the air, and enjoy the freshness air. Item Type: Air Cooler Material: ABS + Silicone + Electronic Components Color: White Product Size: Approx. 18x11x10.5cm / 7.1x4.3x4.1in Weight: Approx. 490g / 17.3oz Water Tank Capacity: 260mL Charging Time: 2H Battery Capacity: Polymer lithium battery 2000mAh (included) Use Time: 2-4H Battery Voltage: 3.7V Output Power: 4W Negative Ion Concentration: 8 million pcs/cm10% Fan Working Current: First gear 590mA/second gear 710mA/third gear 850mA Ozone Concentration:1 x Air Cooler 1 x Instruction Manual 1 x USB Cable 1. Please allow 1& 8209;2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.