Portable Voice Amplifier with Wired Microphone Headset, Rechargeable Speaker, Loudspeaker (Black) Small but very powerful this personal voice amplifier is compact and lightweight, making it ideal for everyday use. The S17 model delivers 30 watts of output power, clearly amplifying your voice while protecting your vocal cords, allowing you to be heard by 25 to 100 people in small to medium-sized settings. Long battery life equipped with a high-capacity 2200mAh rechargeable lithium-ion battery, the amplifier provides up to 12 hours of continuous operation on a full charge. Charging is easy using the included USB cable, with a full recharge taking only 3 to 5 hours. Comfortable and portable the loudspeaker comes with an adjustable strap that can be worn around the waist or neck. It features a back clip for secure attachment to belts or pant waistbands. The wired headset microphone has an adjustable gooseneck design, positioning the mic close to your mouth for optimal sound pickup. Stable performance designed for reliable audio amplification, this voice amplifier is ideal for teaching, training, singing, coaching, tour guiding, presentations, yoga classes, outdoor events, shopping malls, and public speaking. Dimensions: 8.4 x 9.2 x 2.8 cm