I upgraded to an Elekon Batscanner, after my basic heterodyne bat detector finally packed up after 10 years use - I was checking it before our bats emerge because it was a bit iffy on a bat walk I led last September. As yet I have not had the opportunity to use it because the bats are not emerging yet. I am really looking forward to the automatic frequency detection instead of having to set it manually. I have it by my side on the sofa and as soon as I see the first bat fly past our window, having emerged from the nearby woodland, I’ll be out there. Someone on the walk last year had an Elekon which picked up a Noctule. I immediately recognised the sound at the same time we saw it fly by very close. My basic bat detector hadn’t picked it up because I had it set for pipistrelles, of which there were plenty.