Portable voice amplifier for teachers, headset microphone training speaker[Powerful Sound]Small-sized voice amplifier, 8W output is clear and noise-free, enough to cover a room of 30-100 people. Amplify your voice and protect your throat.[Easy to Carry]This portable speaker is small and light, you can use the detachable to fix it on your pocket or belt, or you can tie it around your neck or it on a belt around your waist.[Rechargeable Amplifier]This amplifier has a built-in 4500mAh lithium battery, it takes 4-6 hours to fully charge the microphone speaker, but can play up to 20 hours of amplification time and up to 13 hours of music playback time.[Lightweight pack]. Amplifier This microphone and speaker set is a portable public address system. You can take it to multiple places such as classrooms, bingo phones and outdoors.[Support music playback]This amplifier can play TF (-SD card) card and U disk. You can repeat a single song, loop all music, and switch songs.Colour: goldMaterial:plasticSize:75 x 115 x 31mmPackage Contents:1 x Voice Amplifier1 x Microphone1 x USB Cable1 x BeltOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.