Due to head unit variations

With F7G209WE-Upgrade

Speed Compensated Volume manage(SCVC) counteracts external noise

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This could help save the phone battery

ATOTO S8 Gen4 9" Double DIN Android Head Unit with Backup Camera & OBD2 Scanner, Wireless CarPlay & Android Auto, Built-in 4G LTE, QLED Display, AI DriveChat, DSP with Optical Output, 4V Pre-Out, GPS Navigation P10 Standard Due to head unit variationsA7(S8 Gen4) Android Head Unit Main Features and Frequently Asked Questions S8 Gen4(A7) defines a new class of in car technology, delivering refined intelligence, driving support and performance at a well balanced price. Product Information: 1. Processor & Memory: Octa core processor with true 4GB RAM + 64GB storage ensures smooth multitasking and stable system performance. 2. Operating System & UI: Runs on AICE UI 13M (Based on Android 13) . Supports