V9S Bluetooth Headset Noise Cancelling Headphones With LED Display 1. Bluetooth version: 5.2 2. Bluetooth distance: about 10 meters 3. Headphone battery capacity: 300MAH 4. Supported protocols: HEP\HSP\A2D\AVRCP 5. Process material: ABS + electroplating + silicone ear caps 6. Frequency: 20Hz-20KHz 7. Impedance: 32 ohms 8. Sensitivity: 85dBmW 9. Waterproof grade: IPX 5 10. Packing list: earphone x1, ear cap x2, charging cable x1, manual x1 11. Weight: about 12 grams 12. Size: about 7.2x6x2.1 cm Features: 1. ENC noise reduction for calls, effectively shielding ambient noise and restoring real human voices 2. Stereo sound quality, powerful surround 3. LED digital display, the power level is clear at a glance 4. Smart Bluetooth 5.2 chip, greatly improve the sound signal 5. Soft rubber ear hooks, comfortable to wear, stable and not easy to fall off 6. IPX5 waterproof and sweatproof 7. 180 degree flip earpiece, free to wear on the left and right ears 8. Support incoming call broadcast 9. Simple buttons, convenient operation