Hello, My conference room is set with default energy-level = 300 The first time I use the 7 key, I hear "Zero", while in reality, I went from 300 to 100. Where can we configure the adjustment levels and matching audio prompts? So to have zero for 0, one for 100, two for 200, and have each 7 or 9 key press change the value by 100? Best to all, Emrah