i9s tws bletooth headset true wireless earbuds stereo mini 5.0 bluetooth headphone headset invisible earbud for iphone

1. driver: 15mm 2. impedance: 32 ohm 3. bluetooth version: bluetooth v4.1 edr 4. bluetooth use frequency band: 2.4ghz 5. power level: class 6. output power: 30mw 7. bluetooth distance: 10 m barrier 8. frequency response: 2020000hz 9. working voltage range: 4.2v 10. mitou sensitivity: 42db the package includes: 1pair i9s bluetooth headset 1 charger box 1 rechargeable usb cable 1 protective cover 1 buckle 1pcs user manual