Swan 37 Keys Piano Melodica Musical Instrument with Carrying Case,Black 37 KEY BLACK COLOR MELODICA. 37 keys with a tonal range of F below middle C through F. HIGH GRADE MATERIALS. Made of high quality metallic reeds and plastic shell (and keys), which ensure durability and best sound effect. CLEVER DESIGN WITH TWO DIFFERENT PLAYING METHODS. Specially designed a strap on the back of the keyboard and a short bent mouthpiece for standing performance GUARANTEED SOUND AND QUALITY. Superior materials, strict and professional producing processes, careful testing and tuning processes ensure that all required standards are met. INCLUDES A SOFT CASE, A CLEANING AND AN INSTRUCTION. Soft case makes carrying and transporting more convenient. Operation instruction offers you detailed using methods.