S25 Mini Bluetooth Teacher Guide Speaker Street Stalls Selling Loudspeakers Features: 1. Mini size, more convenient to use 2. Upgrade DSP anti-howling chip, no howling or noise 3. Bluetooth 5.0, more comprehensive functions and stable connection 4. Support TF card and MIC interface 5. Supports recording while amplifying to meet various needs (recording requires a TF card) 6. Built-in large-capacity battery, long battery life 7. Multiple wearing methods, you can choose according to your needs Product parameters: 1. Bluetooth protocol: 5.0 2. Effective distance: 15 meters 3. Power: 8W 4. Frequency response range: 60Hz-15KHz 5. Signal-to-noise ratio: 75dB 6. Operation mode: button 7. Number of speakers: 1 8. Interface type: Type-CUSB-C 9. Built-in battery capacity: 2200 mAh 10. Playing time: 6 hours 11. Playback format: MP3 12. Product size: 110 x 80x 34mm 13. Net weight: 200 grams Packing list: -cable version Amplifier x 1, headset microphone x 1, strap x 1, charging cable x 1, manual x 1 -wireless version Amplifier x 1, wired headset microphone x 1, wireless headset microphone x 1, strap x 1, charging cable x 1, manual x 1