1. Bluetooth 4.1，strengthen the data transmission， the signal is more stable 2. Smart APP function 3. The earphone is sweatproof，but can not use for swimming 4. Features: Microphone，Playback Controls，Calling Functions，Volume Control 5. Human engineering design and high quality materials make the headset comfortable for daily use Specification: Bluetooth versiong: 4.1+EDRCharge time : 1-2 hoursStandby time :220 hoursControl distance : 10mTalking time :7 hoursMusic play: 6 hoursNet weight: 15 gBattery capacity: 80 mahEarphone size:18*7*56 mmFeatures: Microphone，Playback Controls，Calling Functions，Volume Control. Package Including:1 x Wireless Earphone1* Manual