This Peterson Strobe Tuners - StroboStomp HD is a great option for any player looking for a consistent, well-built tuner. Peterson has long been an industry standard in the world of strobe tuners, and this pedalboard friendly version makes for extremely accurate tuning. User presets and sweetened tunings makes it a brease to dial in just the right tuning for your particular rig. Multiple backlight color options let's you dial in the best setting for you. Power Supply: Optional (9VDC Negative Center Pin) Peterson Connect Compatible: Yes Note Range: C0 - A#8 Note Selection: Automatic Firmware Updateable Guided Tunings Multi-Color Display Buffered Mode True Bypass Accuracy: 0.1 Cents Display Type: LCD w/ LED Backlight Display Resolution: 417 Segments Stainless Steel Construction USB Micro Port Battery Type: 9V (Included) Power: 9VDC 85mA (Nominal) Power Out: 9VDC 1A ( 1000mA ) Inputs: 1/4" Mono Outputs: 1/4" Mono Mute-able Output: Yes Concert A Range: 390Hz to 490Hz Transposition Range: -6 to +5 Frequency Response Range: 16.35Hz to 7302Hz Sweetened Tunings: Over 60 User Presets: Unlimited