Product Features: 1). Adopt The latest Bluetooth 5.0 Chipset, Lower Power Consumption, Superior Compatibility, Compatible For Almost All The Mobile Phone, Tablet PC, Notebook, Any Devices With Bluetooth Function Or Has A 3.5mm Audio Jack. 2). 40mm dynamic sound speaker drivers, Tuned By Professtional Team, High Fidelity Super Bass Stereo Surround Sound effect. 3). Support TF Card Playback, FM Radio: the headphone built in A TF Card Slot, You Can Insert A Micro-SD Card With downloaded Songs To Play Music; Has FM Radio Function . 4). Built-in High Definition Sensitive Microphone, can Pick Up Phone Call, Wireless Handsfree Talking. 5). Big size earcup with over ear design, Earmuffs Are Made Of Breathable Soft Leather, Super Comfortable Wearing-on Experience. 6). Support AUX Line-in play mode, use 3.5mm audio cable connect, it can be used as a wired headphone, even when the battery is used out, it still can use.