【Powerful & Clear Sound】- 7W output power creates crisp and resonant sound. High enough for medium-sized indoor or outdoor venues for around 100 people. Sound transmission distance up to 100 feet. Amplify your voice and save your throat. 【Compact & Portable】- Small and lightweight size for unladen use. Once the straps have been adjusted, you can wear them crossbody, around your neck, or around your waist, depending on your preference. You can also attach it directly to your clothes or other suitable position. 【Long Battery Life】- Built-in 2200mAh high-capacity battery. It takes 3-5 hours to fully charge and provides 5-10 hours of music playback or 8-12 hours of amplification. 【Multi-function Amplifier】- supply for teaching, meetings, tour guides, etc. Use Bluetooth 5.0 technology for fast transmission. Support MP3 format and TF card input. You can record sound through the microphone and loop all tracks. 【Comfortable & Adjustable Earbuds】- You can adjust the distance and angle between your mouth and microphone. Keep the earbuds in a state where you feel comfortable. Made of durable and wear-resistant ABS material, suitable for both indoor and outdoor. Widely used in teaching, speaking, shopping guide, tour guide, etc.