The Kala Rumbler is the latest model in Kala Brand's distinctive line of award winning portable U-BASS instruments. The Rumbler takes the U-BASS into a new dimension with the addition of custom engineered electronics and new proprietary strings, at an economically friendly price. The Rumbler design integrates a specially designed Kala electronic system with a piezo pickup and is equipped with an active EQ with built in tuner. Each bass is strung with Kala Silver Rumbler Strings which are proprietary U-Bass strings designed and manufactured exclusively for Kala Brand Music by aquila strings. Padded gig bag included. Die-cast U-Bass tuners, laminate mahogany construction, mahogany neck with rosewood fingerboard and bridge. Laminate Mahogany back and sides. Mahogany neck. Rosewood fingerboard and bridge, 16 frets, 21" scale. Custom die cast tuners. Kala silver Rumbler strings. Custom Kala inlay. Kala electronic system with an active EQ and built in tuner.