[Clear and Loud Sound and Multi-Format Support] Amplify your voice and save your throat when you need it. Provides a clear and stable sound, perfect for large groups. The product mainly has two functions, one as an amplifier and one as a versatile speaker. The speaker can be used with MP3 and WAV formats. It also works as a music player and PC speaker. Music can be played via two interfaces, one for TF card and one for USB stick. [Versatile and Practical] This powerful, portable and super simple amplifier speaker system is a must-have. It can be used for a variety of purposes, such as making your voice heard at meetings, for teaching in large rooms, for large outdoor events such as weddings or for tour guides. [Rechargeable Voice Amplifier] Built-in 1200 mAh lithium battery, so that the microphone speaker is fully charged in just 2-3 hours, but provides up to 3-4 hours of amplification time and up to 4 hours of music playback time. The amplifier has clear voice, stable and loud sound for use in coaching, presentations, training, teaching with many people in large spaces. [Mini Size to Carry] Mini and portable. Its compact size and low weight mean it can be used anywhere, such as by teachers, outdoors, etc. Compact in size, but with a built-in speaker that can deliver powerful results. [Indicator Light Design] The indicator light provides different signals. The blue indicator shows when the power is on. It flashes when you insert the TF card/USB stick. When the remaining electricity is below 10%, the blue light flashes. During charging, the red indicator lights up until it is fully charged and then turns off. Portable voice amplifier with wired microphone speaker FM radio MP3 The speaker can be used with MP3 and WAV formats. It also works as a music player and PC speaker. Music player with two interfaces, one for TF card and one for USB stick Portable voice amplifier Megaphone amplifier with wired microphone Speaker FM radio MP3 Suitable for: teaching, tour guides, promotions, meetings Supports USB disk and TF card for playback Power: Greater than 5W Battery capacity: 1200mAh Charging: use standard USB 5V (can use mobile phone charger) Color: black Material: ABS Size: 8.5 x 8.5 x 3.3 cm Package includes: 1 x Portable voice amplifier 1 x Wired microphone 1 x Belt Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The allowed measurement error is +/- 1-3 cm.