13mm dynamic speakers for a richer audio experience and ENC noise cancelling for clearer call: The larger driver delivers the Hi-Fi stereo sound with crisp, clear high notes and deep, rich bass. So with the ear buds wireless, you can enjoy more vivid sound than ever. Also, The built-in microphones in each eabud for calls with ENC noise reduction will reduce the environmental noise by up to 35dB, allowing gamers to communicate more freely. It s your great choice for relaxing and business. Small size, big possibilities: 3g single earbud, pocket design charging case with LED power display, and 40H playtime: The wireless ear buds feature a portable design and an improved LED display that shows the remaining battery of each head phones and charging case in real-time. And on a full charge of 1H, your earbuds wireless Bluetooth will last up to 8H, plus the fully charged case can provide about 4 recharges for it.