[Clear and Loud Sound and Multiple Format Support] Amplify your voice and save your throat whenever needed. Provides clear and stable sound, ideal for large groups. The device has two main functions: an amplifier and a versatile speaker. Supports MP3 and WAV formats. Includes music player and PC speaker functionality. The music player features 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. Ideal for meetings, teaching in large rooms, outdoor events such as weddings, or tour guiding. [Rechargeable Voice Amplifier] Built-in 1200mAh lithium-ion battery charges fully in 2-3 hours, providing up to 3-4 hours of amplification or 4 hours of music playback. Delivers clear, stable, and loud sound suitable for coaching, presentations, training, and teaching in large spaces. [Mini Size to Carry] Compact and lightweight design ensures portability and convenience. Suitable for use by teachers, outdoors, and other on-the-go applications. Despite its small size, it features a built-in loudspeaker capable of powerful audio output. [Indicator Light Design] Indicator lights provide status feedback. Blue light illuminates when powered on and flashes when a TF card or USB drive is inserted. Blue light flashes when battery level drops below 10%. Red light remains on during charging and turns off when fully charged. Portable Voice Amplifier with Wired Microphone, Loudspeaker, Speaker, FM Radio, MP3 Supports MP3 and WAV formats Music player includes two interfaces: one for TF card and one for USB flash drive Portable Voice Amplifier