Ok so the world is full of mini tuners, automatic tuners, pedal tuners, clip on tuners, etc, etc, so on and so forth, however, this is actually quite clever. It's a Bluetooth tuner which connects to your smart phone and can allow any conceivable tuning arrangement, you simply place the Roadie on your machine heads, plug your guitar into the supplied adapter and play each string at a time. The Roadie then tunes each string to within 2 cents of the note and you're done. Automatic tuning aside this device will also build a harmonic profile of your new strings and reference them each time you tune using the Roadie. It's then able to tell you if your string quality is so impaired that they need to be replaced.
Roadie Tuner retails for $99 and is available direct or via retailers across the US.
MM 2016 Kit:
Tascam DR-70D 4 Channel recorders