I play for a classic country/rock band and use one of these regularly. I'll keep one clipped to the headstock and leave it there for quick tune checks between songs or sets. The red one seems to work best if you're playing with others especially in a crowded bar. It has a Mic/Vib switch on the side.
I'll just roll the volume knob down and run through the strings.. mine never picks up anyone else's instrument when tuning up even if they're playing loud.
Best tuner going in my book!
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