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Capable of handling “stretched” interval tuning, this is the instrument technician’s most valuable tool. The Peterson AutoStrobe 490ST offers a vast array of selectable “stretched” tuning options, including pianos of all types. Enjoy the instantaneous response times that only a Peterson can deliver and the relative tuning display of any audio source to 0.1 of a cent (1/1000 of a semitone) accuracy!     
With the Model 490-ST, students, technicians, and musicians of all levels can utilize automatic (hands-free) note selection for absolutely the most accurate tuning of any instrument. Key features including real-time display of intonation to improve performance and listening skills while playing as well as mutable throughputs for in-line (yet silent) tuning during performances round out the package! 

                                    

Power Supply:  Built-In (IEC)

                                

Stretch Tuning Tables:  9 Preset Stretches

                                

Note Range:  C1 to B8

                                

Note Selection:  Automatic Or Manual

                                

Foot Pedal Control:  +/- Octave, Note Increment

                                

Peterson Connect Compatible:  No

                                

Form Factor:  Desktop/Bench

                                

Accuracy:  0.1 Cents

                                

Display Type:  Single Analog Strobe Disc

                                

Display Resolution:  Infinite (Analog)

                                

Construction:  Metal Casing

                                

Product Dimensions LxWxH:  13.4" x 6.375" x 3.5"

                                

Product Weight:  7lbs. (3.18kg)

                                

USB Port:  No

                                

Power:  AC 100V to 240V

                                

Built-In Microphone:  Yes

                                

Built-In Speaker:  No

                                

Metronome:  No

                                

Inputs:  1/4" Jack

                                

Outputs:  1/4" Thru

                                

Mute-able Output:  Footswitch Controlled

                                

Tone Generator:  No

                                

Concert A Range:  350Hz to 550Hz

                                

Global Cent Offset Range:  +/- 50 Cents

                                

Transposition Range:  Keys of C, Bb, F, Eb

                                

Frequency Response Range:  32.70Hz to 7902.13Hz

                                

Warranty:  1 Year

                                

User Presets:  255 User Presets

                                

Historic Temperaments:  Yes