The Roland BK-3 is a highly complete starter-model keyboard with 61 keys, and it's equipped with 850 sounds, 50 drum sets, various effects and 250 backing rhythms. You can easily store your playing on a USB stick as an audio file.
The Roland BK-3 is an affordable backing keyboard that offers a wide range of sounds and rhythms. In this budget-friendly set, it is complemented by a Quiklok BX-718 keyboard bench.
The high-quality BK-5 is easy to control, but offers more than enough functionality to please demanding one-man bands. Interesting additional features include a USB input for MP3 files, etc., and a video output for song lyrics.