Being new to Guitar Tuners (and music and guitar playing) , I ,relied on the good product reviews on TanbiMusic MT560GB Metronome-Tuner and ordered it..
Very surprised it was so easy and fast to set up and use the Standard Tuning mode It has other functions besides a metronome and tuner. it also has built-in mike and speaker. A sound pickup comes with the tuner so that you can clip the pickup directly on the guitar and use it to tune your guitar instead of the using the built-in mike and block out eternal noises.
2 AAA cells come with the tuner!
There are 3 Tuning modes, Guitar Tuner, Bass Tuner and Chromatic Tuner. I had questions about using the Chromatic Tuner
for tuning the guitar to non-standing tuning like Taro Patch Tuning used in Guitar playing Hawaiian Style - Slack Key Guitar - so I contacted TanbiMusic support and got Debby, the Sales Manager. She answered all my questions; reminded me to register my Tuner for 1 year guarantee and informed me of a new downloadable User Manual for my Tuner and also helped me download the manual.
I bought an inexpensive, versatile, easy to use Guitar Tuner with a fast, no-nonscence, product support!!!!!.