These high quality ukulele strings use the Nylgut formula patented and manufactured exclusively by Aquila Corde Armoniche Srl in Italy. The Nylgut strings are a high-tech product produced with unmatched precision and consistency resulting in best tonal quality and highest intonation stability even under changing environmental conditions which is why they are the best choice for ukuleles. What is included Kohala Akamai Ukulele Instruction Learning Booklet Soft Case included Mini Clip-On Tuner with Battery 1 Extra Pack of 4 Strings Mini Clip-On Tuner Features Compatibility: Works with all ukuleles and most string instruments Accuracy: Easy to read super accurate Functions: Ukulele chromatic violin guitar bass Color: Color changes when in tune backlight Positioning: Double jointed for multi-angle positioning A4 Frequency: 430 - 450Hz Tuning Item: Chromatic Guitar Bass Violin Ukulele Tuning Range: A0(27.5Hz)-a3(1760Hz) Dimension: 52(L) x 25(W) x 86(H) mm The new Lanikai clip-on electric tuner makes tuning your ukulele a breeze. This super accurate easy to use tuner works with all ukulele tuning and with most stringed instruments.