General description The Battery Operated Fan is a versatile and portable mini fan designed for various settings including strollers, cars, gyms, offices, and outdoor activities. It features a 4000mAh rechargeable battery that supports fast charging, ensuring you stay cool wherever you go. Technical specifications Battery capacity: 4000mAh Charging time: 4 hours with 5V/2A input Operating time: 4.5-40 hours depending on speed setting Dimensions: 21 x 15 cm Compatibility and accessories Compatible with USB charging adapters, power sources, and laptops Installation No installation required; simply charge and use Usage Three speed settings: low, natural, and powerful 360° vertical and horizontal manual rotation for adjustable wind direction 80° automatic oscillation for extended coverage Aromatherapy function: add essential oils for a refreshing scent