pcmtuner ecu programmer

Porsche Cayenne 2008 change km, OBDSTAR X300M or X300 PRO3?

Puzzles from a customer:
I just wanna change mileage for my Porsche Cayenne 2008. Sounds many tools in http://www.eobdtool.co.uk/ are available, like OBDSTAR X300M and X300 PRO3. Which one should choose? To save more and to perform that as easy and quick as possible.
Eobdtool customer service:
Hi, we advise you to select OBDSTAR X300M. It’s designed for IMMOBILIZER (key programming) and OBDII (basic diagnosis). Also, your Cayenne 2008 is listed in is vehicle list. Moreover, X300M is a new product made by OBDSTAR, which adopts ARM high speed chip to keep it running fast, stable and anti-jamming.
If just for mileage adjustment, OBDSTAR X300M is an ideal choice for you, i bet.
Ps. OBDSTAR X300M vs. X300 PRO3
-- OBDSTAR X300M for €209
OBDII+Odometer Adjustment
-- OBDSTAR X300 PRO3 Key Master for €615

Full Configuration with Immobiliser+Odometer Adjustment+EEPROM/PIC+OBDII+EPB+Oil/Service reset+Battery matching
How to change mileage on Cayenne 2008?
Part 1: change mileage with OBDSTAR X300 M
Part 2: change mileage with OBDSTAR X300 PRO3
Part 1 - change mileage with OBDSTAR X300 M
the dashboard of Cayenne 2008

the current mileage: 2345744km
note: check connection of the car and X300 M
here goes to Cayenne odometer correction.

select Cayenne->Cayenne -2009->MILEAGE ADJUSTMENT

->enter a file name to save, here 11100000
input value: 11100000
X300M programmer managed to read the current mileage of 234560 (error does not exceed 10km)
->input new mileage: 345430
input value: 345430
->adjusting mileage...
->adjustment complete
the dashboard displays the new mileage as what is set just now
Cayenne change km SUCCESS.
Part 1 - odometer correction with OBDSTAR X300 pro3
connect X300 PRO3 to the obd port on the car
input the file name to save: 11000000
then X300 PRO3 displays the input value 11000000
X300 PRO3 programmer read the current mileage: 1122008km (error does not exceed 10km)

input the new mileage for km change: 12345

X300 PRO3 is adjusting the mileage...
milege adjustment complete
Cayenne displays the new mileage on the dashboard
obdstar x300 pro3 change mileage SUCCESS!
This is from EOBDTOOL website technical support: Porsche Cayenne 2008 change km, OBDSTAR X300M or X300 PRO3?