Bluetooth Headset Digital Display Charging Compartment Low Latency Game Pair Ear With Stereo Business Sports EarphonesFeatures:Chip upgrade: upgrade 5.2 Bluetooth chip, automatically start and matchLarge-capacity charging compartment: The charging compartment has a battery capacity of 300mah, which can be used as a headphone storage box.Intelligent noise reduction: intelligently reduce noise for calls, listen to songs, intelligently filter noise, and enjoy high-definition call effects without being affected by noisy environmentStrong compatibility: regardless of brand mobile phone and model, devices that support Bluetooth can use this headsetLED smart cold light digital display: real-time display of powerProduct Description:Specifications:1. The power of the earphone speaker: rated 3mw up to 5mw2. Speaker size: 13mm in diameter3. The frequency response range of the speaker: 20-20000HZ4. Speaker sensitivity: average sensitivity 99db5. Speaker impedance: 326. MIC size: 4x13mm, tube core microphone head: 423db7. Headphone standby time: 7-9 hours of playing music8. Battery voltage: 3.7V9. Charging time of the charging compartment: about 1 hour10. Earphone charging time: about 1 hour11.Bluetooth frequency 2.4G12. Headphone battery: 40 mA13. Rechargeable battery: 300 mAh with protection board14. Transmission distance: 10mPackage Included:2x earphone1x charging compartment1x charging cable4x ear cap1x instruction