Guitar and bass tuner with Sound Reference.- Muto and Manual Tuning mode, Sound Mode - sound generation guitar and bass- pitch shift : A4 = 435-446Hz (1Hz step) - flat / sharp tuning (b-bbbbb, #-######) - 1 x input jack- 1 x output jack - built-in microphone - LCD display - ultra-bright LED's - separate "Mode","Note","Pitch" & "Sound" buttons - analogue meter - calibration indicator - memory back-up - digital cent indicator offers supremely accurate tuning - power : 2 x AAA extra-long life batteries (200hrs use)- display dim. (HxW) : 6,2 x 2,4 cm - total dim. (HxWxD) : 6,4 x 10,6 x 1,8 cm