Check the listing for details. MP3 Format TF card U disk decoder board amplifier decoding audio Player module. Color: As shown, Condition: New. Listed at 6.09 USD. Description: Features & Benefits: Superior sound quality.Onboard 2W mono amplifier(5V power of up to 3W) is directly connected to the speaker (recommendation 4 Ω 3W speakers),3.5mm gold plated headphone jack can connect with headphones or external audio With a Micro USB port.Through the mobile phone data line can use mobile power supply or the USB cable to charge the MP3 battery,also can use 3.7V lithium battery,or USB 5V power supply Support TF Card (mobile phone memory card) and U disk play mode No soldering with speaker terminals for easy wiring The module is designed to facilitate modification Power range: 3.7~5.5V Product size: 47mm*34mm/18.50*13.38" Product Overview: Support MP3 format, playing power on automatically.When mp3 is played the red LED flashes Support U disk (test 32G), TF Card (test 16G) play mode; power on default TF card mode, if the TF card does not exist automatically jump to the U disk mode,and both devices have installed,then you can manually set the play mode.For details please see the key operating instructions Buttons can be adjusted up and down to control songs,volume up and down, pause or play, mode switching.For details please see the key operating instructions Press menu button enter the single/all song play mode.The default mode is the all song mode when power up.Pressing the Repeat button can replace the circulating mode Key Operating Instructions: "Prev / V--" button: "Press" for switching previous song, "long press" for volume down "Next/v++" button: "Press" for switching next song, "long press" for volume up "P / P / Mode" button: "Press" for the "Play/Pause" Switch, "long press" for U disk, TF card mode "Repeat" button: "Press" for “single/all song" mode(no long press) Note: "Long press" approximate 2S If you use U disk mode, it is recommended 5V power supply, and some U disk does not support 3.7V power supply Exquisite double board design, large area of copper, stable and reliable Quantity:1pc Package includes: 1x MP3 Format TF card U disk decoder board amplifier decoding audio Player module