[Clear and Loud Sound and Multiple Support] Amplify your voice and save your throat at any time you need it. clear and stable sound, perfect for groups with many people.The product itself has two mainly functions , one is an amplifier, and another one is a multi-applicability speaker.The speaker can apply on MP3 and WAV o form. Music player and are included.Music player has two interfaces, one is for TF card, and another interface is for USB flash drive.[Versatile and Practical] , portable, and super easy to , this amplifier speaker system is a must-have! It can be used for a wide range of purposes, to make your voice heard at meetings, or when teaching in a room, for big outdoor events, such as weddings, or tourist guides.[Rechargeable ] -in a 1200mAh lithium- battery, so the microphone speaker full charge only takes 2-3 hours, but play amplification to 3-4 hours, music playback to 4 hours.Amplifier has clear voice, stable, and loud sound to in coaching, presenting, training, teaching with many people in big space.[Mini Size to Carry] Mini and portable. The compact size and light weight allows it to function anywhere, such as teachers, outdoors, etc. Compact in size, but with a -in loud speaker capable of producing results.[Indicator Light Design] The indicator light gives different signal. The blue indicator appears when on. It flashes. when insert TF card/USB flash drive. When remaining is below 10%, the blue light. will flash. On the charging status, the red indicator is be on until fully charged would be off.Portable with Wired Microphone Loudspeaker Speaker Radio MP3The speaker can apply on MP3 and WAV o form. Music player and are includedMusic player hastwo interfaces, one is for TF card, and another interface is for USB flash drivePortable Voice Amplifier Megaphone Booster with Wired Microphone Loudspeaker Speaker Radio MP3Suitable for: teaching, tour guides, promotions, meetingsSupport USB disk and TF card to play musicAudio : Greater than 5WBattery capacity: 1200mAhCharging: standard USB 5V (can mobile phone charger)Colour:blackMaterial:ABSSize: 8.5 x 8.5 x 3.3cmPackage Contents:1 x Portable 1 x Wired microphone1 x charging cable1 x BeltOnly the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.