I'm wondering if I should have bought these for my e trac or just spent a little extra and bought the minilab pro sonic. the first set of gray ghosts I got would not pair right out of the box. after I sent them back the next set worked ok for a couple of months and now I'm sending them back because the transmitter is dead. im starting to think that id of been better off getting the minelab's with all the money for shipping them back has cost me.