1. Thick electroplating K gold dense mesh + electroplating K gold dense mesh + high-density anti-blowout sponge, three layers of noise reduction 2. High-power speakers, 360-degree independent shocking stereo surround sound 3. It is both a speaker and a microphone, making it more convenient to use 4. Adopt DPS digital processing A-level chip, intelligent noise reduction, restore pure tone 5. Bluetooth/USB cable/TF card three playback modes, you can choose according to your needs 6. Material: aluminum alloy, plastic, electronic components 7. Features: 3D surround sound effect, DPS intelligent noise reduction, built-in 5W loudspeaker 8. Pickup: Capacitive 9. Frequency response range: 20Hz-50KHz 10. Reverb mode: echo sound effect reverb 11. Speaker output: external magnetic speaker 12. Battery capacity: 1200mAh lithium battery 13. Playing time: 6-8H 14. Charging time: 2H 15. Output power: 5W 16. Charging power supply: DC5V/1A 17. TWS couplet: support 18. Bluetooth protocol: 4.2 19. Product size: 25 x 3 cm 20. Product weight: 360 grams