That doesn't actually tell us much. EM327 is the name of a microcontroller chip that does OBD-to-RS232 transcoding, but it's in a lot of OBD readers, some of which support the right messages to work correctly with MGV, and some of which don't. As an example, here's a list of brands I found while asking for "ELM327" on Amazon:
FORScan
ODBATOR
BAFX Products
Taotao
ODBMonster
AUCARAUTO
SCCJGL
Grafken
SOOLOON
Fanlynk
WashingLee
OBDLink MX+
VEEPeak
MeStart
VGate
BlueDriver
Foxwell
aoonav
LAUNCH Creader
Konnwei
Autosion
At least six of those are obvious attempts to pretend that they're the VEEPeak one (being identically shaped and colored), four look like pretender FORScans (shape and label pattern), and there's one pretender OBDLink. We especially don't know how well the obvious pretenders are, because if they're willing to rip off design choices and sell for $8 instead of $17 (much less than $140 that the app-author-recommended OBDLink MX+), who knows what other shortcuts were taken?
