This project is designed to add an amplifier and 2 USB ports to the Piaggio Quargo. The file is divided into two parts to allow for easy insertion of the USB ports and to think about other potential parts like a cell phone holder, card or coin holder. The left side contains slots for USB ports and a potentiometer for the amplifier. The module I used as the amplifier is Bluetooth-only, and it's the zk-502l . The battery charger is LM2596 , while the right side is for miscellaneous storage.