The N85 Stereo Multifunction Digital Headset with LCD Display is not just a headset. It provides high?fidelity sound with high?quality speakers and sound chambers. With FM Radio functionality, it scans, receives and saves FM Channels. It also functions as a music player that can be used when running, cycling or playing other sports.It supports 3 formats: MP3, WMA and WAV. When equipped with an audio cable, it can be used as a wired earphone. You can play music from the memory. It also has SD card and USB slots. The N85 uses a practical and replaceable battery that can be used for 10 hours of continuous listening.