What is the difference between the 
Professional and Standard units
The screens (pads) are all made to 
fit either the 9" or 10" housings and so the externals are the same.
It is the internals which change not slightly but dramatically.
The cheaper screens will have USB but if you try to power phones or run an 
external device like DAB+ or TPMS or even a Apple Carplay / Android Auto dongle 
then he screen suffers,  They start to overheat and the screen may freeze 
up as they just do not cope.  Most of the cheap screens on the market are 
1gb of Rom and 16gb of RAM.  Some suppliers may trick these up using 
software to show they are 2/32 - they are not.   Some may show the 
latest Android, again they are not.  The good side is they are cheap, they 
work with inbuilt GPS and radio, reversing camera and so they are good for car 
yards who wish to move a car out.  They are not geared toward and end user.
The professional screens sold here are 4/32GB or most are 4/64GB.  They are lightning fast.   
They have internal Wireless Apple Carplay and Wireless Android Auto available. They come with 2USB and a third is available for buyers who select USB devices   
They use a True Digital Signal Processor for superior sound quality.   
We only supply recognized CANBUS interfaces and so no damage will be done to 
your cars computer.   
They are preloaded with Ozi Explorer and mapping (will need a $35 license 
purchase).   These are geared toward the car owner who is going to 
keep the car more than a few months. 
The current spec sheet is available at
www.brashimports.com.au/S310Specs.jpg and the display page is
www.brashimports.com.au/S310.pptx