The NTune NT500 CTR3 Special Edition Artist Series Chromatic Guitar Tuner (humbucker version)  is specially designed to fit most electric guitars and basses that have a 3-way toggle switch and humbucker pick-ups.

Conveniently placing the N Tune display ring around the toggle switch, the Artist Series NT500CTR3 tuner is activated by pulling up your volume control knob, which also mutes the output signal of your instrument while tuning. Once you're tuned up, simply push the knob back down and play.

N-Tune NT500CTR3 Artist Series On-board Chromatic Tuner Main Features Include:

• Fast, accurate tuning, installs right into your guitar or bass
• For use in most 3-way toggle switch guitars and basses with humbucker pick-ups
• Pull your volume knob to tune up silently; push knob back down to play
• Includes black and Gibson Creme colored tuning rings & switch caps and a specially deisgned, high quality 500k push-pull potentiometer
• True bypass design preserves your instrument's original tone
• No drilling or permanent modifications required
• Installs easily using standard soldering tools
• Auto shut off to preserve battery life