Multifunctional HiFi MP3 player: plays music and offers practical features like calendar, stopwatch, alarm clock, FM radio, pictures, ebooks, etc. Suitable for children, family or friends. Storage and formats: supports up to 128GB memory card (not included), allowing storage for over 10,000 songs. Compatible with MP3, WMA, WAV, APE, FLAC, AACLC, M4A, OGG, and other common formats. The builtin 500mAh battery charges in about 2 hours and provides up to 48 hours of playback. Wireless connection: Bluetooth 5.4 enables wireless connection to headphones or speakers for stable transmission with minimal interference. Note: Bluetooth is for connection to headphones and speakers. HiFi sound quality and recording: built with quality speakers and a powerful sound decoding chip to restore original HiFi sound. 3.5mm headphone jack allows private listening with headphones (not included). Includes a recording function with lossless sound quality and clear voice reproduction.