ACT-300  Multifunctional Clip Tuner

Tuning Mode:   Chromatic,  Guitar,  Bass,  Violin
Auto Power Off
Backlight LCD
Calibration:  A4=430Hz - 450Hz
Detection: Vibration mode, Sound mode
Volume Control
Tone Generation
Button battery CR2032(3V) x 1

user manual (pdf)

AH-500C  Chromatic Metro - Tuner

Metronome tempo: 30 - 250 BPM
Rhythm Select
BeatSelect,  
Tone mode,  
Earphone Jack
Tuner Calibration: 410Hz - 480Hz
Tone Generation
Chromatic Tuner for All instruments
two AAA (3V) battery

user manual (pdf) 

AH-300C  Chromatic Metro - Tuner

Metronome tempo: 30 - 250 BPM
Rhythm Select
BeatSelect
Tone mode
Earphone Jack

Tuner Calibration: 410Hz - 480Hz
Tone Generation
Chromatic Tuner for All instruments
two AAA (3V) battery

user manual (pdf) 

AT-100G  Guitar & Bass guitar Tuner

Guitar Mode: 6, 7 string guitar
Bass Guitar Mode: 4,5,6 string bass guitar
Calibration:  A4=430Hz - 450Hz
Tone Generation
two AAA (3V) battery
Auto Power Off

user manual (pdf) 

AT-200C  Auto Chromatic Tuner

Chromatic Tuner for All instruments
Simple and Easy Tuning
two AAA (3V) battery
Auto Power Off

user manual (pdf)