Wiress Bluetooth Earphone Pink 1. Bluetooth 5.0 technical standard, using dual-chann Bluetooth 2. Noise reduction technology, intligent recognition of human voice and environmental noise, high-definition calls with dual headphones 3. Can be used with a single headset or with two headsets 4. Pick up the automatic connection and pairing, simple operation 5. One-key control can activate multiple functions 6. One-click wake-up voice istant, listen to your commands at any time and control ly 7. LED cold light intligent display power status 8. Use with charging box for long-lasting battery life 9. IPX6 professional waterproof, not afraid of sweating 10. Earphone mini 11. In-ear design, using soft skin-friendly silicone material, comfortable to wear, no pain for a Product parameters: 1. Charging box size: 45.4 x 45.4mm 2. Earphone weight: 5g 3. Charging box: 31g 4. Rated power: 3mW 5. Working range: barrier- 15 meters 6. Standby time: about 520 days 7. Talk time: about 4 hours 8. Charging time: 30 minutes 9. Headphone battery capacity: 50mAh 10. Charging input interface: Micro USB 11. Sensitivity: 98+/-3dB 12. Frequency response range: 20-20KHz