Storage and formats - Expandable memory up to 128GB via microSD (card not included), allowing you to store 10,000+ songs. - Supports multiple formats including MP3, WMA, WAV, APE, FLAC, AAC-LC, M4A, OGG, and more. Battery and charging - Built-in 500mAh battery with a charging time of about 2 hours. - Up to 48 hours of playback on a single charge. HiFi sound and listening options - HiFi lossless sound quality produced by quality speakers and a powerful sound decoding chip. - 3.5mm headphone jack for private listening with headphones (not included). - Recording function with lossless sound quality, clearly reproducing human voice. Bluetooth connectivity - Bluetooth 5.4 for stable wireless listening with reduced interference. - Connects to Bluetooth headphones and Bluetooth speakers for a cable-free experience. - Note: Bluetooth function only supports Bluetooth headphones and Bluetooth speakers. Multi-functionality - Not just a music player: includes calendar, stopwatch, alarm clock, FM radio, pictures, e-books, and more. - A versatile gift for children, family or friends. - Compact and portable design suitable for everyday use. Use scenarios - Commute or travel: store thousands of songs, switch to Bluetooth headphones for hands-free listening, and enjoy long battery life without frequent recharging. - Gym or outdoor activities: lightweight, portable HiFi player with wireless connectivity for freedom of movement and uninterrupted music. - Study, home, or family time: access FM radio, view pictures, read e-books, and use calendar and alarm for scheduling, all in one device. This MP3 player with Bluetooth combines wide format support, long playback, high quality sound, versatile features, and wireless convenience in a compact, portable design.