Description from Amazon FRANCE :
Seiko SAT10 - stunning Guitar and Bass tuner with Reference tones Colour: black Offers supremely accurate and precise tuning, with flat tuning mode and input/output jacks High contrast LCD display provides improved visibility, ultra-bright LED's. 3-LED display (Red/Green/Red) Tuning Mode: AUTO, MANUAL, SOUND (Reference Tone) Tuning range Guitar (6-/7 string): 7B, 6E, 5A, 4D, 3G, 2B, 1E Tuning range Bass (4/5/6-string): LowB, 4E, 3A, 2D, 1G, HiC Reference Tone (Sound Generation) Guitar: 7B, 6E, 5A, 4D, 3G, 2B, 1E (1 Octave higher) Reference Tone (Sound Generation) Bass: LowB, 4E, 3A, 2D, 1G, HiC (2 Octaves higher) Pitch Shift: A4 = 435 - 446 Hz (1Hz Step) Flat Tuning Function, Flat/ Sharp Tuning range: 1b - 5b, 1# -7# Built-in microphone for Acoustic Guitars Separate buttons for: Mode, Note, Pitch, Sound 1x Input jack/ 1x Output jack (6,3 mm/1/4") Analogue Meter Calibration Indicator Memory Back-up Digital Cent Indicator for precise tuning Auto Power Off Power: 2x 3V AAA batteries (extra long-life batteries, included in delivery) Display dimensions (HxW): approx. 62 x 24 mm Total dimensions (HxWxD): approx. 64 x 105 x 18 mm Weight: approx 90 g (incl. battery) Follow-up model of the SAT-101 The STM-20 Clip-style pick-up Microphone can be optionally connected to this tuner.