Specification: Origin: Mainland China Size: 106x66x60mm/4.17x2.6x2.36inch Material: Acrylic Channel output: 2 channels Output power: 3W+3W Power supply voltage: DC 4.2-5v, exceeding 5v will damage the module Rated current: 1.5A-2A Circuit function: The red terminal of the Bluetooth-compatible module is powered by the 5V power supply, the white terminal is the left and right channels of the speaker, the red wire is positive +, and the black is negative -. As music or other sounds sound, the LED lights will flash and move according to the rhythm of the sound (the speed of the sound). After successful welding, you can feel the beautiful melody combination of sound and light. Circuit principle: The voice-activated LED melody light circuit consists of a power supply circuit, a microphone amplifier circuit, and an LED light-emitting indicator circuit. The power supply uses two batteries. The MIC converts the sound signal into an electrical signal, which is coupled to Q1 for amplification via C2. The amplified signal is sent to U1, which drives the ED to emit light. The louder the sound, the brighter the LED and the faster the water flow. Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x DIY BT Speaker Kit Ideal for Welding and DIY Projects: This DIY BT speaker assembling electronic welding kit is highly suitable for soldering and DIY enthusiasts, as well as for educational and training purposes, providing a platform for learning and creativity. Elegant Acrylic Casing: The electronic sound amplifier's casing is made up of six 3mm acrylic panels, resulting in a visually appealing and refined appearance. Before assembly, the brown protective film needs to be removed for a perfect finish. Versatile Power Options: The DIY BT speaker box kit supports automatic music playback with DC power supply ranging from 3.7V to 5V. It features a stereo amplifier, Bluetooth-compatible connectivity, power loss memory function, and even supports music playback from USB drives. High-Quality Sound: Equipped with a PU full-range speaker and a 40-magnet, 4-ohm, 3W silver-black diaphragm, this DIY BT speaker kit delivers excellent value for money with its clear audio output. The sound quality is crisp and immersive, enhancing your listening enjoyment. Convenient Remote Control: The DIY BT speaker kit assembly component allows for easy control through a remote, enabling users to effortlessly switch it on/off and adjust the volume according to their preferences, providing a hassle-free user experience.