Very poor technical support.I had several issues including the return of infrared sensors.They sent me a new set but problem still persisted.Followup call was totally useless as is the info sheet provided by the mfr.It was written in english but as would be spoken in chinese.made no sense whatsoever.I resolved this issue by calling a competitor.Several other things required speaking with them but I discovered they are VERY poorly trained despite their so called certifications. Fortunately I am an engineer and only wanted their input in order... read full review »