3D stereo surround heavy bass, enhance bass transmission, intelligent noise reduction, HIFI high-definition lossless sound quality, so that you can enjoy a truly immersive experience.Premium Level Bluetooth 5.0 version; The effective connection distance between Bluetooth and the speaker is up to 10 meters; The speaker has a built-in microphone and supports voice calls.Support Micro SD TF card audio playback and mobile phone, laptop, PC Aux audio external playback, you can adjust the volume you like through the device connected with the speaker.Wireless series function,support one mobile phone (or devices with Bluetooth function) connected to two wireless Bluetooth speakers at the same time,to achieve a unique dual playback experience.It is made of metal body material, so it has texture, not only small size but easy to carry. Can be applied to home theater, entertainment, games, office, outdoor, travel.