Quiet action Technology: Advanced noise reduction engineering maintains peaceful execution below 30dB, making it perfect for areas, kids ' rooms, or study spaces where quiet is important for rest or concentration USB Charging Convenience: Includes a 1200mAh rechargeable battery with standard USB charging function, working with, PCs, or wall chargers Efficient Cooling Build: Made from sturdy ABS with excellent heat management, this device stays cool during extended use Multiple Speed Settings: With several speed levels from gentle to powerful ventilation, this fan delivers customized comfort Portable Clip Design: This cooling handheld clip fan features an easy to use clamping mechanism that securely attaches to surfaces like desks, baby strollers, or bed frames without tools