[Clear and Loud Sound and Multiple Format Support] Amplify your voice and save your throat when needed. Provides clear and stable sound, ideal for group settings. The device functions as both an amplifier and a versatile speaker. Supports MP3 and WAV formats. Built-in music player includes 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, classroom teaching, outdoor events, weddings, or guided tours. [Rechargeable] Equipped with a built-in 1200mAh lithium-ion battery. Full charge takes 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 allows for easy portability. Ideal for teachers, outdoor use, and other on-the-go applications. Despite its small size, it features a built-in loudspeaker capable of powerful o output. [Indicator Light Design] Indicator lights provide status feedback. Blue light appears when powered on and flashes when a TF card or USB drive is inserted. Blue light flashes when battery level is at 10%. Red light indicates charging and turns off when fully charged. Portable Voice Amplifier with Wired Microphone, Loudspeaker, FM Radio, and MP3 Player Supports USB drive and TF card o output: 5W Battery capacity: 1200mAh Charging: Standard USB 5V (compatible with mobile phone charger) Color: Black Material: ABS Size: 8.5 x 8.5 x 3.3 cm Package Contents: 1 x Portable Amplifier 1 x Wired Microphone 1 x Charging Cable 1 x Belt Clip Note: Light reflection and display differences may cause slight color variation between the image and the actual item. Measurement may vary by +/- 1-3 cm.