Surprisingly it came with a battery which was not included in the purchase. yes but since the screen size was not written i expected it to be a bit larger than what i found it. its quite small...but serves the purpose. accuracy is okay not so bad but takes time to display the notes...while using it on the ukulele. i played the G chord, hile it showed a B. so i wont say the best, unlike my previous tuner by FZone. but it overall its good for 300 bucks.