Features: - Portable: Compact size, multifunctional MP3 player. - Multifunctional: Combines pen functionality with MP3 playback. - Rechargeable: Built-in rechargeable lithium battery; up to 4 hours of playback time. - Material: High-grade frosted plastic shell; pen-shaped design, sturdy and durable. - Plug and Play: Supports up to 32GB microSD card (not included). - Simple operation: Load audio files and use immediately. - Audio enhancement: DTS 5.1 surround sound for improved audio performance. Specifications: - Product name: MP3 Player - Battery capacity: 100 mAh - Charging time: Approximately 1 hour - Working time: Up to 4 hours - Audio format supported: MP3 - Memory expansion: Supports microSD cards up to 32GB - Operation mode: Button control - Charging interface: Micro-USB - Material: Plastic - Color: Black Package Contents: - 1 x Pen-Style MP3 Player Note: Actual product color may vary slightly due to screen settings and lighting conditions. Slight measurement variations of ±1–3 cm may occur.