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Find a Service Center near you
Contact the Service Department
Instructional Documents
Proto-Sound Battery Replacement OptionProto-Sound 1 Software/Battery Issues
Proto-Sound AC Transformer Compatibility Chart
Proto-Sound DC Transformer Compatibility Chart
Why M.T.H. Uses NiCad Batteries and When to Replace Them
Instructional PDFs
Wiring MTH Accessories (PDF file)
Instructional Video
Smoke Unit Replacement
