The Korg GA-1 has broken the shackles of my addiction, I agree now almost every day and even always know how it must sound ... until the day on which I have hopefully internalized and no longer, or less often will need.
The device is very inexpensive, lightweight and compact and can be explained almost by itself. Unpacking, supplied batteries pure red button to switch on press (listening mode) and string by string strike. The display gives information about the note, a digital pointer moves to the right or left when out of tune. Simply rotate so long to the respective vertebrae to the strings on the headstock until the green light replaced the red light and let's go.
In addition, has the KORG GA-1 tuner using the opportunity to be play for the correct sounds to the strings (E, A, D, G, H, E) by one-off or repeated actuation of the first black button labeled "Sound ". In my estimation, the device allowed by a jack input and the voices of semi acoustic guitars and electric guitars. I use it for my Yamaha C40 classical guitar, but do not see any reason why you could not even agree western guitars and bass guitars that.
Have fun with it, just buy it - never again unassisted when guitar voices!
