4000mAh Lithium Battery-Powered USB Rechargeable OEM Logo Rechargeable Mini Handheld Fan Hand Fan

4000mAh Lithium Battery-Powered USB Rechargeable OEM Logo Rechargeable Mini Handheld Fan Hand Fan. 4000mAh Large Battery: Built-in 4000mAh lithium battery provides long-lasting power for extended use. 199 Speed Levels: Features 199 levels of infinite wind speed adjustment for precise control. 3-in-1 Versatility: Supports handheld, desktop, and neck-hanging usage modes for maximum convenience. Digital Display: Equipped with a digital screen to display remaining battery life clearly. Low Noise Design: High-speed brushless motor operates at low noise levels around 36dB. Multi-Function Cooling: Combines cooling fan with a night light function for versatile utility. OEM Logo Customization: Supports OEM services to print custom logos on the battery cover. Premium Battery Cells: Uses famous brand battery cells to ensure sufficient capacity and safety.