John Petrucci presents Samson CT20 Clip-On Tuner

John Petrucci of Dream Theater taking and demonstrates his Samson CT20 Clip-On Tuner

Some of main Samson CT20 Clip-On Tuner features:

Full color LCD display
Built-in mic for precise tuning
Flat tuning/transposition
Real-time response for tuning accuracy
Pitch calibration rages from A 410 to 490Hz
Powered by a single CR2032 battery (included)
Auto power-off and energy-saving functions for maximum battery life