WST-550G Guitar Mate - especially for tuning electric and acoustic guitars.

Auto LED tuner
180 clip-on design
Tuning mode: Clip (vibration)
Vibration sensor allows accurate tuning in noisy environments.
Auto-Detect Function indicates note name.
Easy-to-read LEDs show you which way to tune.

Tuning scale: Electric guitar, Acoustic guitar
Tuning range: A2 (65.40 Hz) - A4 (445 Hz)
Calibration: A4 = 440 Hz
Power: (3V) 1x CR2032 Lithium Battery (inclusive)
Auto-Off feature increases battery life.
Dimension: ca. 78(L) x 48(W) x 45(H)mm
Weight: ca. 20g
Colour: Black