Optimal Voice Amplification: Experience crystal-clear sound with SHIDU's Mini Voice Amplifier, designed specifically for teachers, tour guides, and fitness instructors. Its powerful audio projection makes it perfect for outdoor and indoor activities. Bluetooth Connectivity: Easily pair with any Bluetooth-enabled device to stream music or amplify your voice. This versatile amplifier also serves as a portable speaker. Comfortable Headset Microphone: Includes a lightweight, adjustable headset microphone that comfortably fits and provides excellent sound quality, ensuring your voice is heard clearly without strain. Portable and Lightweight: The compact design makes it easy to carry around, fitting into any bag or even a pocket, making it an ideal choice for dynamic and mobile teaching or presentations. Durable Battery Life: Equipped with a long-lasting battery, it provides extended use without the need for frequent recharging, supporting your speaking engagements throughout the day. Battery: 3.7V 1800MA battery Output power: 10W Speaker unit: 3-inch single coil speaker Due to different batches, there may be differences in product printed text, which will not affect use Colour:A:Black/B: Green Material:ABS Package Contents: 1 x Voice Amplifier kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.