The chinese tuner was quite precise until it broke down after a year of no so intense use. The first thing that went wrong was the spring that attaches to the headstock. It kept on falling off and it was really cheap made. The plastic is what you would expect, it is really weak. The first year it showed a clear screen and could be used to tune. It worked with a CR-2025 battery and had a microphone on the front, under the display, that worked when there was not a lot of noise. Now, it has an infunctional screen and connection to the circuit. It cannot be used.