Product SpecificationBluetooth Version 4.1Micro USB charging portSupport HFP， HSP， A2DP， and AVRCP profilesConnect with 2 Bluetooth devices at the same timeOperating Range: Up to 30 feet (10 meters)50mAh rechargeable batterytalk time: 4 hoursStandby time: 45 daysCharging time: about 1~2 hoursBattery indication for iPhone CVC echo and noise cancellationVoice prompt: power on / pairing / connected / battery low / power offWearing InstructionsT6C Earphones are designed basing on ergonomic， here attaches two sets of ear pouches which can be used interchangeablely depending on the individual wearing habit. And you can adjust the sound quality of the Earphones' brand and noise reduction through the fit of the size of ear pouches and ear canals. Confortable wearing can be bring you a perfect sense of listening and a good pleasure with the enjoying the wonderful sound.