Wide Application: Bluetooth Mp3 Decoder Board Can Easily Improve The Sound Quality Of Ordinary Audio, Widely Used In Toys, Gifts, Fitness Equipment, Household Appliances, Broadcasting Systems, Etc. 12v Bluetooth Mp3 Decoding Board Can Directly Switch The Signal, And Insert Support Usb, Tf Card. Bluetooth 5.0 (Wireless Music Games Can Be Realized After Linkage With Mobile Phones) Can Use Usb/Tf/Bluetooth/Fm/Line Switches And Mp3/Wma, Wav Lossless Music Decoding Chips. Type: Mp3 Decoder Board Model: JQ- Function: Bluetooth Decoder Key Operation Detail 1. Pause: Short Is The Switch Between Pause And Play; Long Is A Radio Fm Automatic Station; 2. Vol-Button: Short To Select The Previous Song; Long Is The Volume Down, Double Click To Switch To The Previous Folder; 3. Short To Select Song; Long Is The Volume Increase, Double Click To Switch To Folder; 4. Repeat: The Single Loop Function, Again To Cancel The Single Loop, And Sequentially; 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; Long To Start Recording, The Button Again To Cancel The Recording Function And Play The Recording File; Internal Recording Only (Only Audio Input, Radio Fm, Bluetooth); When Recording, It Is Necessary To Connect A Storage Device, Such As: U Disk Or Tf Card; Of The Recording Function When Recording, It Is Necessary To Connect A Storage Device, Such As: U Disk Or Tf Card; Colour:As Shown Material:ABS+FR4 Size:7.5 x 5 x 2.3cm Package Contents: 4 x Decoder Board 4 x Remote Control 4 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.