Charging Fan with LED Display YT-M2047. Key Features and Specifications: Design: A portable, handheld form factor with a circular fan head and a digital display. Charging: Most fans in this category use a USB Type-C interface for recharging. Power: These devices often feature multiple speed settings (some models offering up to 100 or 120 adjustable levels) and high-speed brushless motors. Estimated Backup Times: Low Speed: Approximately