Small But Very Powerful – The S17 is a compact, lightweight personal voice amplifier with 30 watts of output power. It clearly amplifies your voice while helping protect your vocal cords, making it ideal for addressing groups of 25 to 100 people. Long Battery Life – Equipped with a high-capacity 2200mAh rechargeable lithium-ion battery, it delivers up to 12 hours of continuous operation on a full charge. Charging is simple using the included USB cable and takes only 3–5 hours. Comfortable and Portable – Features an adjustable strap for waist or neck wear. Includes a belt clip for secure attachment to belts or waistbands. The wired headset microphone is fully adjustable. Stable Performance – Designed for reliable, consistent audio performance. The flexible gooseneck headset microphone positions easily near your mouth for optimal sound pickup. Ideal for teachers, trainers, coaches, tour guides, presenters, yoga instructors, and outdoor speakers. Dimensions: 8.4 × 9.2 × 2.8 cm