NBY 6690 TWS Couplet FM Multifunctional Desktop Plug-in Card Bluetooth Speaker Features: 1. 52MM 16-core large speaker + 1.2-inch passive diaphragm, natural and balanced bass output, rich low frequency 2. Rechargeable polymer battery 1200 mAh, fast charging, long battery life 3. Metal mesh design, beautiful and sturdy, low resonance and strong rigidity 4. Bluetooth 5.0 chip, deep bass stereo sound, no delay, no lag, no noise, stable signal, strong compatibility 5. HD microphone, intelligent noise reduction and no delay 6. FM radio, real-time information control 7. 4 playback modes to meet different needs Product parameters: 1. Material: cowhide, ABS 2. Bluetooth version: 5.0 3. Transmission distance: 1-10 meters 4. Connection method: Bluetooth connection, 3.5MM audio jack 5. Frequency response range: 90HZ-20KHZ 6. Signal-to-noise ratio: 70db 7. Number of speakers: 2 8. Speaker power: 5W52mm 9. Supported formats: U disk, TF card 10. Audio input: 3.5mm interface 11. Battery capacity: 1200mAh lithium battery 12. Charging time: 2 hours 13. Playing time: about 3-6 hours 14. Standby time: 12 hours 15. Product size: 212 x 72 x 71mm 16. Product weight: 650 grams Packing list: -Speaker x 1 -Charging cable x 1 -Audio cable x 1 -Manual x 1