[Powerful Sound]This amplifier is small in size, but the 8W output is clear and noise-free, which can cover a large room of 30-100 people. The stable performance ly amplifies your voice and protects your throat. [easy to carry]. - This portable microphone and speaker is compact and ultra-light, you can attach it to your belt or pocket using the detachable clip on the back, or you can tie it around your waist or hang it around your neck with a belt. [Rechargeable Loudspeaker]The loudspeaker has a built-in large lithium battery, the microphone speaker takes 4-6 hours to fully charge, but it can play up to 20 hours of amplification time and up to 13 hours of music playback time. [ Power Box]This microphone and speaker set is a portable public address system. You can take it to classrooms, bingo calls, and outdoors. [Support music playback]Amplifier TF (Micro-SD) card playback and USB flash drive playback. You can repeat a single tune, loop all music, and switch songs. size: 9.2x8.4x2.8cm Material: plastic colour: Black Package Contents: 5 x Voice Amplifier 5 x Headphone 5 x Belt 5 x USB Cable Only 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.