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Identifying the function and features of Four- in- one VCM , two-in-one VCM and copied VCM.
1.Four-in-one original VCM:
(1) Its shell is aluminum with good texture and feel.
(2) made in original plastic material with tender feel in gilt needle industry, its OBD cable and USB cable have strengthened conduction function and connecting stability, as well as long time and repeated insert and pull function, and not easy to bend and deform.
(3) its mainboards are all environmental green gilt ones. Two curcuits are intergrated into one in good welding with brandnew original IC. With intensive IC in the board, it has complex structure and comprehensive components.
(4) Useful life of original VCM is about 3 years.
(5) function and features: can work with Landrover, Jaguar, Ford, Mazda.

2. Two-in-one VCM made in Shenzhen
(1) It has red plastic shell, gorgeous appearance and feels light.
(2) USB cable and OBD are made in common plastic materials. Its pin is made in common copper. It is short in durability and easy to bend and deform.
(3) The mainboard is red with two pcs curcuit boards. Its mainboard and IC are new and in good quality, though it is not original in structure.
(4) Its useful life is about one year.
(5) function: it can diagnose and program ford and mazda, as well as diagnosing and guard against theft some Land rover.

3 Market copied VCM
(1) its red shell is also made in aluminim with gorgeous color and feels rather light and blank.
(2) We can see its structure clearly after removing its shell. Such VCM has only one green mainboard with simple and cheap structure.
(3) Its USB and OBD cables are made in common plastic materials with copper pins. It is short in durability and easy to bend and deform.
(4) As it is new on the market, we are not clear how long it can be used.
(5) It can diagnose and program part Land rover, Januar, Ford, Mazda. It is the same as universal equipment. The shortcoming is that it is incomplete in diagnosing and simple in function