Come and see our amazing products. The new and improved 200mAh lithium polymer battery allows seamless enjoyment of music for up to 30 hours and 28 hours clear calling, 60 hours of stand-by, only take 2 hours to fully charged, battery status always displayed on your phone. 360 degree HD SOUND QUALITY: DSP noise cancelling technology reduces outside noises, enable clearer microphone sound. Built-in microphone delivers HD audio clarity, good sensitivity, anti-interference characteristics. HIGHLY COMPATIBLE AND UNIVERSAL: Bluetooth V4.1 technology with talking and music function, easy and fast pairing with smart phones and tablets. VOICE PROMPT FUNCTION and TWO DEVICES CONNECTED: D5 headset can remind user "Incoming call number", "Power on/off" ,"Pairing", "Connected/Disconnected" via voice. Pls confirm further with us if any query about packing info, inventory status and time schedule.