Boulder Creek EBR3-N4F Acoustic-Electric 4-String Fretless Bass Fretless acoustic-electric 4-string bass with natural satin finish Port on the top side of the guitar to direct the sound to the player SBS bracing system allows top to vibrate more freely, improving projection Top constructed of solid cedar with mahogany back and sides 34-inch long scale; AB4-T preamp with built-in chromatic tuner