[Usb Power Supply] After Fully Charged, The Handheld Fan Can Last For 2-4 Hours. This Is Also A Usb Fan Compatible With Universal Usb Device Ports. You Can Charge It With A Power Bank, Pc/Laptop, Mobile Phone Charger, Etc.$[Lightweight And Portable] The Portable Fan Weighs Only 0.18 Pounds. The Design Is Moderate In Length And Width. It Is Very Easy To Hold. It Can Be Placed In A Pocket Or Bag. It Is Suitable For Outdoor, Sports, Travel And Palm-Sized. With A Removable Base, You Can Use It Used As A Desk Fan In The Office, Makeup, Home Or Carry-On To Solve Hot Issues During The Journey. Meet Your Cooling Needs Throughout The Day.$[3 Speeds, Small Size But Powerful] The Built-In Powerful Motor Provides Cool Airflow At 3 Different Speeds, Allowing You To Choose The Right Wind Speed As You Like. Working Time For Speed 1: 4 Hours, Speed 2: 2.5 Hours, Speed 3: 2 Hours. The Perfect Partner To Keep You Cool In The Hot Summer When Traveling, Working Or Exercising.$[Safe One-Key Operation] It Is Made Of High-Quality Abs Material And Can Be Used Safely By Adults And Children. One-Key Operation, Simple Operation, Press To Turn On/Off The Fan, Press Repeatedly To Adjust The Wind Speed.$If You Have Any Questions, Please Contact Us.