Small but very powerful If you are looking for a personal voice amplifier that is small and lightweight, then the S17 is the right choice for you. It is a portable microphone speaker with 30 watts of output power, which can clearly amplify your voice and protect your vocal cords, so that you can easily make your voice heard by 25 to 100 people. Long battery life The small voice amplifier has a highcapacity 2200 mAh lithiumion battery that provides up to 12 hours of operation from a fully charged battery. Charging is easy via an included USB cable. And it only takes 35 hours to fully charge. Convenient and portable ① Portable speaker comes with an adjustable strap that you can use to tie around your waist or hang around your neck. ② The teacher speaker amplifier has a clip on the back, you can attach to a belt or waistband. ③ The wired headset microphone is adjustable. Stable Performance It is an original voice amplifier with stable performance. The portable headset microphone is a fleible gooseneck design that is directly placed near the mouth. Perfect for anyone who does events and needs to project their voice. Suitable for teaching, trainer, singer, coach, tour guide, shopping mall, presentation, yoga, outdoor speech and etc. size 8.49.22.8CM