X5 TWS Bluetooth V5.0 Wireless Stereo Headset with Charging Case and Digital Display, Support Intelligent Pairing(Black Red) Product features: 1. Support automatic starting up and pairing 2. Intelligent battery state monitor 3. Smart touch, easy to operate 4. Binaural stereo sound for clear sound quality 5. Life waterproof, can be used when outdoor sports and fitness Main parameters: 1. Chip: AC6936D 2. Bluetooth version: 5.0 3. Supporting protocols: HFP1.7 HSP1.2 A2DP1.3 AVRCP1.6 4. Frequency range: 2.402GHz-2.480GHz 5. Charging voltage: DC 5V0.5A 6. Speaker: 6mm 16ohm 7. Headphone battery capacity: 50mAh 8. Storage box battery capacity: 300mAh 9. Standby time: 200 hours 10. Talking time: 4 hours 11. Music time: 5 hours (60% volume) 12. Headphone size: 18x22x24mm 13. Charging box size: 70x43x33mm 14. Net weight: 68g Packing list: charging case x 1, headset x 1 pair, charging cable x 1, user manual x 1