I had one and spent $300 on it. I got this sniffer two weeks ago for $20. It works better than my $300 sniffer. It makes me look very professional. save me time I used to blow lines to find leaks. Never. Follow the audio signal. It says it will take 24 hours, which is a lot of snooping. For $20? There will always be a new additional waiting time. This and an ammeter I just bought for very low amps are a MUST HAVE for appliance repair people. Thank you - Chuck - Appliance Technician - Hot Springs Ar
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