6Pcs Micro Usb Mp3 Decoder Module Tf Card U Disk Mp3 Format Decoder Board, 5.5V Product specifications: Power range: 3.7~5.5V Product size: 45mm*36mm Exquisite double board design, large area of copper, stable and reliable. Features: - Superior sound quality.Onboard 2Wmonoamplifier(5V power of up to 3W) is directly connected to the speaker(recommendation 4?3Wspeakers),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. 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: 1."Long press" approximate 2S. 2 .If you use U disk mode, it is recommended 5V power supply, and some U disk does not support 3.7V power supply. Package included: 6 x TF card U disk MP3 Format decoder board module amplifier decoding audio Player Product Features 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. 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. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!