HJIAN Portable Table Fans (Blue) Table fan with misting function; 4 modes: Fan&misting-Misting-Low speed fan-High speed fan. Please switch the back key to "on" before using. Powered by built-in 2000MA rechargeable battery. Could used as a emergency power bank to charge mobile phones and digital device through the connection to USB. One touch sensitive switch to control modes ; Easy to operate. (NOTE:Turn on the back switch before using, turn off it when not use). Using time: 5 hours for first level Fan; 3 hours for second level fan;2 hours for Misty; 1.5 hours for Fan+Misty. Note: Please Fully charge the fan for 8 hours to fully charge the battery and make batteries play a better performance and efficiency.