Pause: Short Press Is The Switch Between Pause And Play. Long Press Is A Radio Fm Automatic Station -Key: Short Press Is To Select The Previous Song. Long Press Is The Volume Down, Double Click To Switch To The Previous Folder Short Press Is To Select Song. Long Press Is The Volume Increase, Double Click To Switch To Folder Repeat: Press The Single Loop Function, Press Again To Cancel The Single Loop, And In Order EQ: Sound Field Mode, Test 6 Sound Quality. (Classical) (Jazz) (Rock) (Bass) (Normal) Description: 1. Type: MP3 Decoder Board;Power: 2 x 40W 2. Model: JQ-D128BT 3. Function: Bluetooth Decoder 4. Material: Shell Material: ABS; PCB Board Material: FR4 Detailed Keystrokes 1. Pause: Short Press Is The Switch Between Pause And Play; Long Press Is A Radio Fm Automatic Station; 2. -Key: Short Press Is To Select The Previous Song; Long Press Is The Volume Down, Double Click To Switch To The Previous Folder; 3. Short Press Is To Select Song; Long Press Is The Volume Increase, Double Click To Switch To Folder; 4. Repeat: Press The Single Loop Function, Press Again To Cancel The Single Loop, And In Order; 5. Eq: Sound Field Mode, Test 6 Sound Quality; (Classical) (Jazz) (Rock) (Bass) (Normal) 6. Mode Button: Switch Between Usb/Tf/Fm/Audio Input/Bluetooth Function Sequentially; Long Press To Start Recording, Press The Button Again To Cancel The Recording Function And Play The Recording File; Internal Recording Only (Only Audio Input Can Be Recorded. Radio Fm. Bluetooth); When Recording, You Need To Connect A Storage Device, Such As: U Disk Or Tf Card; Description Of The Recording Function When Recording, It Is Necessary To Connect A Storage Device, Such As: U Disk Or Tf Card; size: 7.5 x 5 x 2.5cm Material: ABS+FR4 colour: As shown Package Contents: 1 x Decoder Board 1 x Remote Control 1 x Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.