Smart Battery Management: The portable handheld fan ia built-in 2000mAh rechargeable battery (USB-C charging) provides 2-10hours runtime across 5 speed settings. Battery indicator and auto-shutoff prevent over-discharge. Full charge in 2.5 hours with included cable.Powerful & Energy-Efficient Handheld Fan: Equipped with brushless motor technology, this portable handheld turbo fan delivers 3-5X higher rotation speed (up to 6000 RPM) than traditional fans while consuming 30% less energy. Enjoy turbo-charged airflow without excessive battery drainUltra-Portable Powerhouse: Compact size (3.01.67.8in) and lightweight design (215g/0.5bl) makes this pocket fan effortlessly portable. It can be hung on a backpack or even put in a pocketMulti-Position Cooling Experience: The 90 adjustable folding head converts this hand held fan into 3 usage modes: handheld personal fan, neck-hung cooling companion, or desktop mini fan. Perfect for indoor/outdoor use during travel, workouts, or office hoursDual-Function Cooling Pad & Precise Reminder: Integrated semiconductor cooling chip provides localized cooling for face/neck/hands (NOTE: This is NOT an air conditioner substitute). Features 5 adjustable speeds with whisper-quiet operation (<30dB) for undisturbed use