JOYROOM E320i Single In‎-ear Bluetooth 4.1 Wireless Stereo Earphone with Mic‎.‎    Bluetooth V4.1 connection‎,‎ High‎-fidelity sound quality and stable performance‎.‎    Built‎-in high‎-quality microphone‎,‎Support hands‎-free phone conversation‎.‎    Ergonomic design for wearing comfort and stability enhancement    4 language options‎:‎ French‎,‎ Spanish‎,‎ English‎,‎ Chinese    Support voice prompt for Bluetooth pairing‎,‎ incoming calls‎,‎ connection status‎,‎ low battery power and power off    Can be connected to two devices at the same time    Unimpeded connection distance of 10 meters    Concise and slim design‎,‎ fit facial contourTechnical Specification‎:‎    Brand‎:‎ Joyroom    Model‎:‎ JR‎-320i    Bluetooth version‎:‎ V4.1 + EDR    Bluetooth protocol‎:‎ HFP‎,‎ HSP‎,‎ A2DP‎,‎ AVRCP    Sensitivity‎:‎ 98dB+/‎-5dB at 1KHz    Transmission range‎:‎ ≤10m    Charging voltage‎:‎ 4.75V ‎- 5.25V    Frequency response‎:‎ 20‎-24KHz    Standby time‎:‎ 180 hours    Talk time‎:‎ 4 hours    Music time‎:‎ 3 hours    Charging time‎:‎ ≤2 hours    Battery‎:‎ 55mAh Li‎-ion battery   Applicable models‎:‎    Support the battery level display of iphone and some other cell phones‎.‎  Output voltage    4.75V‎-5.25VCharging time    about 2 hoursStandby time‎:‎    about 180 hoursSpeaker Impedance‎:‎    16ohmCharging Interface‎:‎    Micro USBNet weight    16gMaterial    metal shell‎,‎ top Rank Chip‎,‎MagneticCompatible    3.5MM Plug‎,‎ compatible phone‎,‎ ipad‎,‎ mp3‎,‎mp4‎,‎ camera and ect 99% electronics‎,‎Protection    Enjoy music‎,‎ with on/off function