Korg DT7 Guitar/Bass tuner


for bass guitar in a guitar tuning is interesting from korg, guitar tuning absolutely right features the Buzz Feiten Tuning System, and also a Fully Functional The Guitar and Bass Tuner, Korg DT7 with the following features

Features:
  • Two types of tuning modes can be selected in this hand held tuner: chromatic mode (for tuning normally tuned instruments) or Buzz Feiten mode
  • Large LED-type meter and seven-segment note display ensure optimal visibility, making this guitar tuner the perfect choice for any guitarist or bassist
  • Wide tuning range [A0 (27.50 Hz) to B7 (3,951.07 Hz)], allows tuning of a wide variety of instruments including five and six-string basses
  • A compact, easy-to-view design keeps this guitar tuner stable even when placed on an amp
  • Buffer amp between the INPUT jack and BYPASS jack eliminates any tonal coloration
  • A convenient Sound Out mode
  • Built-in microphone allows use with acoustic guitars
  • Calibration: Manual (A4=438Hz-445Hz), Auto (428Hz-452Hz)
  • Connections: Input/Bypass (Sound Out)/Mute/DC9Vin
  • Batteries: 1 x AAA size manganese battery
  • Battery life: 12 hours
  • Dimensions: 6.65"(W) x 1.71"(H) x 2.48"(D)
  •  Weight: 0.39 lbs.  
Source : http://www.korg.com/Product.aspx?pd=22