ATOTO A6 Pro

As I add to my old car more electronics, GPS, backup camera, dash cam, Bluetooth, etc, I figure all that can be handled by the Android auto head unit.  I picked up ATOTO A6 Pro for about $220.  It has the following features:

• Model Name: A6Y2721PRB (2GB/32GB);
• SoC Chip: MTK 8127A Soc-based Quad-core 1.5Ghz Cortex-A7 (512K L2) CPU with ARM Mali-450 MP4  600MHz GPU.
• Pre-Amplifier: Built-in Max 4*49W BTL Amplifier with RMS 4*29W (Vcc=14.4v,THD=10%); It can drive both 4Ω & 2Ω door speakers! 
• Preset 9-band EQ with 12 section adjustable frequency;
• Bluetooth: Dual Bluetooth (BT1 5.0 & BT2 4.0). Bluetooth1 is Qualcomm Bluetooth 5.0 w/ aptX feature, and it supports HFP/HSP/A2DP/AVRCP/PBAP;
• Radio tuner: Built-in FM/AM Radio Tuner w/ RDS (station name will be displayed if available);
• Display: Full HD 7" 1024*600 5-Touch Capacitive Touchscreen with 600cd/m² latest 178° full-viewing angle IPS display screen;
• GPS/Navigation: Builtin GPS Receiver module with external GPS antenna
• WiFi/Microphone: Builtin microphone & Ultra external Wi-Fi antenna (Silver plated copper wire) and external microphone
• Input/output
• Reversing camera input
• Front camera input
• AUX Audio/Video input
• 4-CH RCA Audio Out (4V) for connecting to amplifiers
• Separate Sub-woof Out (4V) (Manual /Automatic mode available)
• Steering wheel control input
• One Micro SD slot
• 3 USB interfaces, one of which is a quick charge (2A) port

The harness has the following connections

This model has physical buttons, no gesture control.  Having physical buttons is useful because the it is harder to operate the touchscreen while driving.  But in any case, a rotary switch would be better for such things as changing volume. 

When ignition is off, it draws about 18mA.  The standard battery is 45Ahr.  So it is about 1% a day.   It takes 2 seconds to be on after the ignition is on.  When idle, it draws about 700mA.  When in standby, it draws about 330mA.

Installation is not too difficult after watching a number of online videos.