[Small but very powerful] -- This personal voice amplifier is compact and lightweight, making it ideal for everyday use. It is a portable microphone speaker with 30 watts of output power, which can significantly amplify your voice and help protect your vocal cords, allowing you to be clearly heard by 25 to 100 people. [Long Battery Life] -- The voice amplifier comes with a 2200mAh high-capacity rechargeable lithium-ion battery that provides up to 12 hours of continuous operation on a full charge. Charging is convenient with the included USB cable, and it takes approximately 3 to 5 hours to fully charge. [Convenient and Portable] -- The portable speaker features an adjustable strap that can be worn around the waist or neck. It also has a built-in belt clip on the back for easy attachment to belts or waistbands. The wired headset microphone is adjustable for optimal positioning. [Stable Performance] -- This voice amplifier delivers reliable and consistent performance. The wearable headset microphone features a flexible gooseneck design that positions close to your mouth for clear sound pickup. Ideal for individuals who need to project their voice during events. Suitable for teaching, coaching, singing, training, tour guiding, presentations, yoga instruction, outdoor speaking, and use in shopping malls. Size: 8.4 x 9.2 x 2.8cm