Fangrui Product Details 1. Bluetooth Amplifier Diy Kit: This Electronic Diy Kit Help You To Learn Basic Electronic Knowledge And Circuit Principles, And Practice Soldering Skills Enjoyably For You And Your Kids, Or Students, Or Diyers. 2. Great Electronic Soldering Project: For Soldering Practice And Also Suitable For Family Education. Not Only To Improve Your Soldering Skills, You Will Also Will Be More Familiar With Electronic Components And Learn More Interesting Electronics Things. But Please Note,this Soldering Kit Requires Certain Foundation Of Basic Electronic Theoretical Knowledge And Welding And Hands-on Ability. 3. Easy Installation: The Bluetooth Module Board Is Soldered And Can Be Used Directly After Connection. You Only Need To Solder The Led Flashing Light Kit, Connect The Wires, And Assemble The Shell. Fun And Entertaining, Build Your Own Bluetooth Speaker By Yourself, A Cool Project And Challenging Enough To Be Fun. About Power: 5v Mobile Phone Charger Or Computer Power Supply Can Be Used, The Sound Quality Will