Digitech
DigiTech Hardwire HT6 Polyphonic Tuner for Guitar and Bass
List Price: 55(GBP)
The DigiTech Hardwire HT-6 PolyChromatic tuner pedal makes tuning on stage easy letting you check the tuning of all six strings in a single strum. The intuitive display has 15 LEDs per string so you can easily see which strings are off and by how much. It offers several tuning modes including some for bass and has True Bypass so it wont interfere with your tone.