Snark SN-11 All Instrument Clip On Tuner
The SN-11 from Snark is a fully chromatic clip-on tuner with a large display, a transpose function and even a pitch calibration option. Say you are playing with an upright piano that is about a quarter-tone flat. Simply calibrate the tuner to a note on the piano and the relative tuning adjusts itself. The SN-11 is ideal for guitar, but works well for any stringed instrument and is viable for brass and woodwind as well.