Features: ? Two-in-one Bluetooth receiving (RX) and Bluetooth transmitting (TX). ? Built-in DSP decoding chip, heavy bass effect, the device supports treble/bass button adjustment. ? Upgrade the NFC function, and the mobile phone sensor can be connected with one touch. ? Built-in 1200mAh rechargeable lithium battery, continuous listening to music for about 8 hours, battery life up to 30 days ? Support U disk/TF card playback and launch, support MP3/WMA/SBC/WAV/DTS/A52/FLAC/AAC/ AIF/AMR/APE format. ? Built-in FM radio, one-button automatic search and storage, the frequency can be adjusted from 87.5 to 108. ? Built-in 6.5mm high-definition microphone, which supports microphone access for singing, and built-in anti-howling design.