Lanikai LUTU-21C TunaUke Concert Uke w/ Gig Bag and Tuner Includes Gig Bag and Tuner! Affordable concert ukulele with built-in TunaUke advanced intonation system Moveable bridge saddles let you intonate each string precisely A compensated nut helps with tension and intonation issues Nut and saddles made from Glass Impregnated PPS