Edison made several designs of phonographs both with internal and external horns for playing these improved cylinder records. The internal horn models were called "Amberolas". Edison marketed its "Fireside" model phonograph with a gearshift and a 'model K' reproducer with two styli that allowed it to play both 2-minute and 4-minute cylinders. Conversion kits were produced for some of the later model 2-minute phonographs adding a gear change and a second 'model H' reproducer. These kits were shipped with a set of 12 (wax) Amberol cylinders in distinctive orange boxes. The purchaser had no choice as to the titles.