I am planning a trip to Kansas in a couple of weeks and am looking into low tone beeper collars. I have used the tritronics add-on hawk scream beeper for years and it's worked great but I really struggle hearing it do to my high frequency hearing loss. There are only a few lower tone beeper collars on the market today that I know of (Lovett's and DT's). Does anyone have experience with these and would you recommend them? Also does anyone know of a website that allows you to listen to the beeper tones? I knew of one years ago but can't seem to locate it now.