ZANSONG M70 Wireless Bluetooth Megaphone Speaker with UHF Mic Surrport Voice Recorder, FM Radio, TFUSB Port, 3.5mm AUX Input 1. This wireless amplification device is specially designed for teachers, tour guides, and speakers. It supports multiple modes of playback, including Bluetooth 5.1, AUX, USB flash drive, and TF card. It is equipped with intelligent noise reduction technology and a 5W high-power speaker, ensuring strong sound penetration. It comes with ergonomic headphones and a long-lasting battery, meeting all-day usage needs. 2. Wireless Bluetooth 5.1: Stable transmission of musicvoice, with an effective connection range of up to 10 meters. 3. FM radio and recording: Built-in radio function and recording mode, suitable for various scenarios. 4. Noise-reducing microphone: Upgraded DSP chip to suppress environmental noise, intelligent anti-crowd noise, and clear human voice. 5. Adjustable metal headphones: Lightweight metal structure, freely adjustable angle, stable and secure without pinching the head. 6. Product functions: One-click amplification, TF card, USB flash drive playback, FM radio, reverb, loop playback, recording, Bluetooth Parameters: 1. Bluetooth version: 5.1 2. Battery capacity: 1500mAh 3. Input: DC 5V 500mA 4. Speaker size: 3 inches, 3Ω, 5W 5. Supported formats: MP3WAV 6. Function usage: Pressing the M key can switch to "Recording Mode"; when playing music, long-pressing the M key will cycle through tracks