Description: Small but Mighty - If you need a small and lightweight personal voice amplifier, the S17 is perfect for you. This portable speaker microphone boasts 30W of output power, significantly amplifying your voice and protecting your vocal cords, allowing you to easily be heard by 25-100 people. The small voice amplifier is equipped with a large 2200mAh rechargeable lithium-ion battery, providing up to 12 hours of use on a full charge. Easily rechargeable with the included USB cable (3-5 hour charge time). Easy to Carry: This portable speaker features an adjustable strap that can be worn around the waist or neck. A clip on the back allows for attachment to a belt or waistband. Adjustable cord microphone. Stable Performance: This is a high-quality voice amplifier with stable performance. The flexible gooseneck microphone sits comfortably near the mouth. Ideal for teachers, coaches, singers, trainers, tour guides, shopping malls, conferences, yoga instructors, outdoor lectures, and more. Dimensions: 8.4 x 9.2 x 2.8 cm