1. DIY Electronic Small Production Small Speaker Parts: Build your own portable Bluetooth speaker with this kit, featuring an MHforM18 Bluetooth audio module and HT6872 foramplifier chip. It supports music playback and amplifies audio signals with the 3W speaker and a music forspectrum melody light circuit. 2. Portable Bluetooth Speaker Power Foramplifier: This DIY kit includes all peripheral components to build a mobile phone speaker. Connect to your phone via Bluetooth to play music, or input audio signals from a 5mm music socket. The 3W speaker delivers beautiful sound under a transparent casing. 3. USB Circuit Soldering Practice Kit: A practical way to assemble audio electronic products and practice soldering skills. Featuring an MHforM18 Bluetooth audio module and HT6872 foramplifier chip, you can power on and connect to phones via Bluetooth for music playback. The 3W speaker includes a music forspectrum melody light circuit with 5 flashing LEDs. 4. Bluetooth Speaker Lowpower Foramplifier: A DIY production welding practice kit that includes a 3W speaker with a music forspectrum melody light circuit. Easily connect to your phone via Bluetooth to enjoy music playback or input audio signals from a 5mm music socket. Use scenarios: portable speaker setup: Build and use as a compact Bluetooth speaker for listening to music from a phone or other Bluetooth source, with the music forspectrum melody light circuit adding visual feedback from the 5 flashing LEDs. Educational soldering project: Use the USB circuit soldering practice kit to learn and refine soldering techniques while assembling a functional Bluetooth audio device powered by the MHforM18 module and HT6872 foramplifier chip. DIY electronics learning or smallscale prototyping: Leverage the kit to explore Bluetooth audio transmission, basic amplification, and audio input via a 5mm socket, suitable for classroom, maker space, or hobbyist projects.