Qwik Tune Q12E Exogenic Chromatic Tuner Qwik Tune QT12E Auto-Chromatic TunerExogenic Tuning: can distinguish between instrument signal and noiseVery reliableLarge, illuminated analogue display3 LEDsCalibration from A 438 to A 445The built-in loudspeaker can reproduce 12 reference tonesTuner is delivered in a black plastic casePowered by 9V batteryBattery not included in delivery