Portable Rechargeable Voice Loud Booster Amplifier Microphone Teaching Speaker w/ Waistband US

High strength ABS shell, durable and solid.
This speaker can make your voice louder with great voice amplification performance.
Built-in rechargeable battery, long battery life, can work for about 15-20 hours on a single full charge.
Comes with a strap, can be worn at the waist and used conveniently. Compact and lightweight, you will not feel heavy.
Can work with MP3, MP4, cellphone, and computer. Ideal for teacher teaching, travel guide, public speaking, etc.