I'm a new ST1 Platinum owner in the San Francisco Bay Area. I think I found an undocumented function on the ST1. Normally you press On/Off and + for 2 seconds to get to the code entry mode. If instead you press On/Off and - for 2 seconds the current Sensitivity setting is shown. You can use -/+ to change it and that sensitivity will stay in effect until you turn it off. On the next power up the default sensitivity setting returns.