The new Carl Martin Tuner has been on the bench for some time. As with all Carl Martin products they wanted to get it just right…simple, attractive, efficient and useable for all types of guitar players. Starting with their classic die-cast black casing, the tuner is switch-able between standard readout and strobe. Both are bright and clear so they can be read from a standing position. The tuner can be calibrated from 437 through 443 with the default of course at A440. Add to this a mute switch (for silent tuning) and True Bypass on/off for a clean signal path, and you have the perfect addition to your Carl Martin pedal collection. The Carl Martin Tuner is powered by 9V battery or an external power supply