b'Descirption: Features: Support MP3 format, automatically for play when power on, and the red LED indicator will update when playing. With a MicroUSB power supply interface, it can be powered by a mobile power supply or a USB charger through a phone data cable, or a 3.7V lithium battery and USB 5V power supply. Support TF card (cell phone internal memory card), U disk for play mode. With speaker terminals, no welding is required, which is convenient for wiring. Specification: Product Name: MP3 Lossless Decoder Board (support TF card/U disk) Material: Printed Circuit Board Size: Approx. 45.72x35.14x12.0 mm Power Supply Range: 3.7~5V Support U disk (tested 32G), TF card (tested 16G) playback mode; power-on default TF card mode, if there is no TF card, it will automatically jump to U disk mode, and both devices are installed, you can manually set the playback mode mode, please refer to the button operation instructions for details. The buttons can adjust the up and down track switching, volume + -, pause/for play, mode switching, please refer to the button operation instructions for details. Press the button to set the single/full song cycle, the default full song cycle when power on, press the Repeat button to change the cycle mode. Notes: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Includes: 1 Piece Decoder Board Module'