Feature 1Easy to Switch, Multiple Formats Supported: Bluetooth MP3 decoder board supports USB, memory card, Bluetooth, FM switching between switching. Support MP3 WMA WAV FLAC APE format music. 2USB and Memory Card: Bluetooth MP3 decoder board supports USB and memory card switching, previous, next, volume adjustment, playback or pause. 3Bluetooth Function: Bluetooth 5.3 sound decoder module supports Bluetooth previous, next, volume adjustment, play or pause, mute. 4Power Off Memory: MP3 decoder board supports power off memory function, which can remember the songs and volume played before the power off to the current point. 5Serial Communication Control: MP3 decoder board supports serial communication control, mode, volume, song selection, stop or play, loop selection.Item Type:BluetoothMP3DecoderBoardMaterial: ABSPanel Size:Length: Approx. 8.5cm/3.3inHeight: Approx. 2.4cm/0.9inDepth: Approx. 2.4cm/0.9inWorking Voltage: 5VWorking Current: 1.5A-2APower: 4 Ohms 3W+3WSound Output: 3P OUT Sound Output (When the External Power Amplifier Is Used, The Module Must Be Powered by a Separate Independent Power Supply)Screw Mounting Hole Spacing: Approx. 7.5cm/3.0inBluetooth: Bluetooth 5.3 .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 xBluetoothMP3DecoderBoard1 x Power Cord1 x Horn CableNoteManual measurement please allow some error.