Awesome tuner - accurate and easy to use. It has more functions than I need but some that will make players of a variety of string instruments ecstatic. Only two issues: 1) The bolt/nut holding the tuner unit onto its clip mount tends to loosen and come apart. I've had the units fall apart during performances and they are no longer usable until repaired. Two of the four clip strobes I use (two older models) we're unusable for some time without jerryrigged fixes because the bolts/nuts are not easily replaced through hardware stores; 2) Peterson would not provide me the bolt/nut specs without first registering my units, two of which I had purchased some years earlier. I ended up working through the retailer who sold me the units to get replacement bolts/nuts. Never did receive the specs so I can replace them myself in the future but so it goes. All four units are working. Note that the tuner units themselves have never had an issue - they work flawlessly. It's just in the design of the attachment. Substantially more expensive than many clip-ons on the market but if accuracy and reliable electronics are important to you, these are the only units.