Compact and Portable: This mini voice amplifier microphone headset is small in size and lightweight, making it convenient to carry and use. Multifunctional: This mini voice amplifier is suitable for various scenarios such as teaching, presentations, guided tours, and training, delivering clear and loud sound to enhance the listening experience. Rechargeable Design: This portable voice amplifier features a built-in rechargeable battery, providing long-lasting performance on a single charge, allowing for continuous use without power concerns. Outstanding Sound Quality: The amplifier delivers excellent sound amplification and clear output, ensuring a high-quality sound experience during speeches or singing. Built-in High-Performance Decoder Chip: Equipped with a high-performance decoder chip, this mini voice amplifier supports MP3 format playback via USB drive or memory card for convenient and practical use. Item Type: Voice Amplifier Material: ABS Battery: Built-in 1800mAh Lithium Polymer Battery (Included) Charging Voltage: DC 5V Bluetooth Version: 5.0 Compatible Devices: Computer, Smartphone, Tablet, USB Drive, Memory Card Weight: Approx. 384.00g / 13.55oz Package List: 1 x Voice Amplifier 1 x USB Data Cable 1 x Belt 1 x Microphone