RadioPRO Advanced has been engineered to save you time and seamlessly integrate into a vehicle's databus system to retain features such as OnStar, steering wheel controls, factory amplifier, audio fade, rear-seat entertainment system, and warning chimes. Features improved sound quality of warning chimes through a provided speaker and direct USB connection for quick and easy product setting adjustments and firmware updates. It also saves you time installing a streamlined harness design, smaller housing, and easier adjustment of chimes and factory amplifier gain. Key Features Warning chimes through the internal speaker Bose amplifier retention (Standard & Premium) SWI-DIRECT add-on steering wheel control interface connection Time-saving, streamlined harness design and small housing USB updatable