Bluetooth 5.0: With bluetooth, you could keep away from cables, it could reduce the power consumption. This device can pair with Bluetooth headphones or speakers, cannot pair with phones or computers.Adjustable Memory: 32GB memory card is installed in the card slot, you can also expand memory according to your need by inserting a larger capacity memory card, maximum support up to 128GB.Long Standby Time: 3 hours of music playback time in Bluetooth headset , 12 hours of music playback time in normal headset. Lightweight , mp3 can be put into the pocket , you could listen to music at anytime and anywhere.Multi-function: Support Bluetooth, music ,Video, FM radio, Record, photo viewer, E-book reader, voice recorder, video(need conversation tool to convert) , Clock.Perfect Sound Quality:You could listen to music while exercising, support most audio formats, perfect sound makes it an essential device for enthusiastic listeners, meet the requirement of your life.