MP3 Lossless Decoding Board Built-in Power Amplifier Module Support Multiple Audio Formats for Car Stereo Modification

MP3 Audio Decoder Amplifier Module for DIY Audio Projects Key Features: ✅ Premium Sound Output: Built-in 2W mono amplifier (delivers up to 3W under 5V power supply), works perfectly with recommended 4Ω 3W speakers. Equipped with gold-plated 3.5mm headphone jack for direct headphone connection or external audio output. ✅ Multiple Power Options: Comes with Micro USB port, you can power it via power bank, standard USB cable to charge the built-in MP3 battery, it also supports 3.7V lithium battery or 5V USB power supply, with a wide working voltage range of 3.7~5.5V. ✅ Multiple Playback Modes: Supports TF card (up to 16G tested) and USB flash drive (up to 32G tested) playback. Defaults to TF card mode on power-on, automatically switches to USB drive mode if no TF card is detected, you can manually switch modes when both storage devices are inserted. ✅ Easy to Use & Modify: No soldering required for speaker connection thanks to pre-installed speaker terminals, super easy for wiring. The module is specially designed for easy modification, with double-layer PCB and large-area copper coating for stable and reliable performance. ✅ Full Function Controls: Physical buttons support track skip, volume adjustment, play/pause, mode switching. Press menu button to switch between single track loop and all track loop (defaults to all track loop on power-on), repeat button adjusts loop modes. Red LED flashes when MP3 is playing. Specs: - Product Size: 45.6mm * 35.2mm Key Operation Guide: 🔹 "Prev / V--": Short press for previous track, long press (≈2s) for volume down 🔹 "Next / V++": Short press for next track, long press (≈2s) for volume up 🔹 "P / P / Mode": Short press for play/pause toggle, long press (≈2s) to switch between TF card/USB drive mode 🔹 "Repeat": Short press to switch between single/all track loop (no long press function) Notes: 1. It is recommended to use 5V power supply for USB drive mode, as some USB drives do not work under 3.7V power supply. 2. All units are 100% tested before shipping to ensure stable performance. The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom's policies and EU Product Safety and Compliance laws.