This Samsung Galaxy Z Flip4 F721U 128GB motherboard main board is a great choice for those looking to repair their device. It is compatible with Samsung phones and is designed to provide a seamless experience. The unit type is a unit and the color is green. This motherboard is perfect for those who need to replace their damaged or faulty motherboard. It is compatible with the Samsung Galaxy Z Flip4 F721U model and is designed to provide a reliable and efficient performance.