MP3 Decoder Board with TF Card USB Disk Support and Built-In Power Supply

MP3 Decoder Board with TF Card USB Disk Support and Built-In Power Supply The MP3 Decoder Board with TF Card USB Disk Support and Built-In Power Supply is a compact audio playback module designed for DIY electronics projects and embedded audio applications. It plays MP3 files directly from a TF (microSD) card or USB flash drive, making it suitable for voice announcements, warning signals, message playback systems, and other audio-based projects. The board features a built-in 2W mono amplifier, with output power of up to 3W when powered by a 5V supply, and works best with a compatible 4Ω, 3W speaker. A 3.5mm gold-plated audio jack allows you to connect headphones or external audio equipment for added flexibility. With support for a 3.7V lithium battery, 5V USB power, or a mobile power bank, this self-powered MP3 player module can be integrated into a variety of portable and stationary setups. Its Micro USB power input and solder-free speaker terminals simplify wiring and installation, making it a practical choice for makers, students, and electronics enthusiasts building custom audio players, announcement devices, and sound-enabled DIY projects. 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. Features: Supports MP3 format, with automatic power on. When an MP3 is played, the red LED flashes. Supports U disk (test 32G) and TF card (test 16G) play modes; power on by default. TF card mode, if the TF card does not provide the required operation. Buttons can be moved up and down to control songs, volume, pause/play, and mode switching. Press the menu button to enter the single / all song play mode. When you turn on the power, the all music mode is selected by default. Pressing the Repeat button will replace the circulation mode.