When I first got my delta it was kinda quirky but it went from that to broken. Lol.The pinpoint mode has been kind of a crapshoot only works seventy percent of the time .Well it finally went to the whole machine started beeping like crazy all high tones 88-92 tried everything new batteries,turned the sensitivity down nothing .Called first texas today they gave me an ra # sending it off tomorrow.Can't wait to get it back!