INDUSTRY LEADING BLUETOOTH TECHNOLOGY: Advanced Qualcomm Bluetooth 5.0 chip, make transmission and faster stable, the MS300 adopted with dual Bluetooth, which can connect to two devices at the same time for calls and music. Seamless switch from working to relaxing. NEVER POWER OFF WIRED WIRELESS: 1.Wireless Mode: The battery update to 72h music/talking time in a single full charge. 2.Wired Mode: With 3. 5mm audio cable (build-in line mic design) packed for working with your devices with 3.5mm jack, such as cellphone, PC, laptop, etc. So that the headset never power off. CRYSTAL CLEAR STEREO HI-FI SOUND : Using 40mm high fidelity speakers, the MS300 can provide the HIFI stereo, rich, clear and true-to-life audio sound, bringing you a fantastic music journey. FUNCTIONAL CONTROL FAST CHARGING: The functional control on the ear cup, allow you control the volume, select songs and answer/hang up calls. The fast charging design: When the battery is low , you only need to be charged 5 minutes and can be used for 2 hours. Release all your workout with this wireless headset. ERGONOMIC DESIGN: The soft memory-protein ear pads can completely cover your ears to release pressure for maximum comfort.