I bought this as an extra tuner for for a new ukulele. It came with a battery installed and an extra battery in the box -- which was a nice surprise. It's as accurate as my more expensive tuners and easier to read. I like it so much I'm leaving the setting on Chromatic and using it on my guitars too (it has Chromatic, Guitar, Bass, Violin and Ukulele modes). You can pay more for a tuner but you sure don't have to!