About this item Longer Working Time(1800mAh Battery):This Desk Fan From TFS Powered By USB Port From Desktop Computers/ Laptops/ Car Charger And Power Etc. You Could Enjoy It With 2-8 Hours After Fully Charge Because Of Different Speeds. Specifications： Color: White, Pink, Green 3 ADJUTABLE MODES ULTIMATE COOLING EXPERIENCE Wanna Hang Out In The Summer But Do Not Want To The Heat? Wear Our Innovative Neckband Fan To Keep Cool All The Time Wherever You Go. Say Goodbye To Sweat And Enjoy Your Summer!