I received my Siren some months ago as a Kickstarter backer, but the firmware to enable it was a relatively recent launch here in the UK.
Like @Capn, I tested mine with a dB meter and confirmed 105dB at a distance of a couple of inches, dropping to 90dB at 6 feet. Given that it needs to be hidden out of reach to be effective, 90dB is a more realistic expectation of it’s practical volume. Contrast that to the advice on many security forums and charity websites who recommend at least 130dB and ideally 140dB for personal attack alarms and it’s clear that this siren is not fit for purpose.
I’m also disappointed that the settings for the siren don’t allow us to monitor the battery or change the tone to say a more pulsating sound (like most alarms).
In my case, the one setting that is provided - the alarm duration - doesn’t even work. When I set it to 1 minute, I get 5 seconds of alarm, then 55 seconds of silence. Set to 2 minutes, I get 10 seconds of alarm and 110 seconds of silence. Is anyone else experiencing that problem?