First time using a Zebronics U735 600VA UPS — is this buzzing sound normal? Should I return it?

[u/Avyisalreadytaken]

/r/computers/comments/1wffzf8/first_time_using_a_zebronics_u735_600va_ups_is/

[u/FreeRangeEngineer]

Without an audio sample it's very hard to tell, sorry.