Voice Amplifie for Teachers, Portable Rechargeable Mini Megaphone with Microphone and Speaker Supports MP3 Format Audio for Tour Guide, Classroom, Training

Powerful Sound： the voice amplifier is compact in size, but the 8W output is clear and noiseless enough to cover a large room of 30-100 people. The stable performance perfectly amplifies your voice and saves your throat., Easy to Carry: the portable microphone and speaker is small and lightweight, use the detachable clip on the back to attach it to your belt or pocket, or you can tie it around your waist or hang it around your neck with the help of a belt., Rechargeable Voice Amplifier： voice amplifier's built-in 2200mAh big lithium battery allows the microphone speaker to take 4-6 hours to fully charge but plays up to 20 hours of amplify time and up to 13 hours of music playtime., Lightweight power box： Voice Amplifier this microphone and speaker set is a portable public address system. You can take it to multiple locations such as classrooms, bingo calling, and outdoors., Supports Music Playing： voice amplifier TF (Micro SD) card playing & USB flash drive playing. you can repeat a single tune, loop all music and switch songs.