We found we sometimes got interference and sometimes didn't. I could never work out what was causing the interference. I found the monitor kept me awake at night as I heard every little noise. Unless your house is large you wont need one as bubs will cry loudly when they need you. We have have a bedroom & an ensuite & WIR between us and bub but could hear him loud and clear every time even if doors were shut. The only reason we had the monitor was that we'd been given it.