[Clear and Loud Sound with Multiple Format Support] Amplify your voice and save your throat whenever needed. Delivers clear and stable sound, ideal for large groups. Functions as both an amplifier and a versatile speaker. Supports MP3 and WAV formats. Includes music player and PC speaker functionality. The music player has two interfaces: one for TF card and one for USB flash drive. [Versatile and Practical] Powerful, portable, and easy to use, this amplifier speaker system is essential for various applications. Use it to project your voice during meetings, teaching in large rooms, outdoor events such as weddings, or guided tours. [Rechargeable Voice Amplifier] Built-in 1200mAh lithium-ion battery charges fully in 2-3 hours, providing up to 3-4 hours of amplification time and 4 hours of music playback. Delivers clear, stable, and loud sound, suitable for coaching, presentations, training, and teaching in large spaces. [Mini Size for Portability] Compact and lightweight design ensures portability and convenience. Ideal for teachers, outdoor use, and other on-the-go applications. Despite its small size, it features a built-in powerful speaker. [Indicator Light Design] Indicator lights provide status feedback. Blue light appears when powered on. It flashes when a TF card or USB drive is inserted. Blue light flashes when battery level drops below 10%. Red light stays on during charging and turns off when fully charged. Portable voice amplifier with wired microphone, loudspeaker, speaker, FM radio, MP3 player. Supports MP3 and WAV formats. Music player includes TF card and USB flash drive interfaces.