Jkjlorey Bluetooth-Compatible Audio Decoder Board Amplifier JQ-D129BT-A 2X5W Music Player Accessory MP3 WMA WAV FLAC Lossless

3. Vol+ Button (Next Song/Volume Increase): Vol+ Short Is Song In Mp3 State, And Long Is Volume Increase; In The Fm State, Short To Adjust The Station Number Down; In The Bluetooth Function, Short Is Song Of Bluetooth, And Long Is Reduced Volume. 1. Vol - Button (Previous Song/Volume Decrease): In Mp3 State Vol - Short For The Previous Song, Long For Volume Reduction; In The Fm State, Short To Adjust The Station Number Upwards; Under The Bluetooth Function, A Short Is A Bluetooth Previous Song, And A Long Is A Volume Reduction. 2. Auto Button (Play/Pause): In Mp3 State, Auto Short Is Play/Pause; In The Fm State, Short Is Play/Pause, And Long Is Automatic Closing And Saving Station; Short Under Bluetooth Function To Play/Pause. 4.Mode Button: Switch Between Usb / Tf / Radio Fm / Audio Input Line In / Bluetooth Function; Long Is To Record The Microphone, And Another Long Is To Stop Recording And Play The Recording; Microphone Description After Connecting The Microphone, All The Microphone Functions Are Available Under The Mold Test; Description Of The Recording Function When Recording, It Is Necessary To Connect A Storage Device, Such As: U Disk Or Tf Card;