With the new Bluetooth 5.0 technology ensures fast and stable connections to your Bluetooth devices with low latency during audio/video streaming. No more worries about audio dropouts during phone calls and music listening. Wired and Wireless Listening: Not just a pair of wireless bluetooth headphones, you can even connect these headphones to any device using a 3.5mm cable to enjoy non-stop music listening even when the battery runs out. Foldable Headphones & TF Card: This headphone is able to fold up to make it more compact and easy to carry. Having the TF card slot lets you put in a SD memory card with music inside the headphones to listen to them to make it a MP3 player headset. Deep Bass Function: This wireless headphones with 40mm drivers with deep bass function deliver high quality playback with superb bass depth and HD clarity.