This unit is not compatible with the newer Niterider LED police light. The mounting hardware was not big enough to handle a mountain bike handlebar. Some screws loosened immediately and required disassembly to access and tighten them. The unit was CONSIDERABLY quieter than 115db. I could only get 95db in very close proximity to the speaker, which is a significant difference since decibels are a logarithmic scale. This unit does not appear to be made by Niterider. Their design/engineering/manufacturing is much better than what I bought.