Portable Voice Amplifier With Wired Microphone Headset Rechargeable Speaker (Black) Small But Very Powerful — This personal voice amplifier is compact and lightweight. It delivers 30 watts of output power, clearly amplifying your voice while helping to protect your vocal cords. It is suitable for use with audiences of 25 to 100 people. Long Battery Life — Equipped with a high-capacity 2200mAh rechargeable lithium-ion battery, it provides up to 12 hours of operation on a full charge. Charging is done via included USB cable, requiring 3–5 hours for a full charge. Comfortable and Portable — Features an adjustable band for wearing around the waist or neck. Includes a clip on the back for attaching to a belt or waistband. The wired headset microphone is adjustable. Stable Performance — Designed for reliable operation. The headset microphone features a flexible gooseneck that positions easily near the mouth. Ideal for teaching, training, singing, coaching, tour guiding, presentations, yoga instruction, and outdoor speaking. Dimensions: 8.4 × 9.2 × 2.8 cm