Check the listing for details. GECKOCajon BOX Drum-Wooden Percussion Box,w/Internal Adjustable Guitar Strings. Condition: New. Listed at 89.00 USD. High quality: cajon box drum IS Selected russian birch, smooth and comfortable. Easy to play: Our Cajon, a perfect musical instrument that brings more life into your music An amazing hand crafted wooden panel box frame built in classic /traditional instrument styleRegardless of skill level, you can play freely. Music training: Inspire budding musicians, cultivate a sense of rhythm, and bring fun at the same time. Sufficient capacity: Our Jam Cajon is exquisitely engineered to allow musicians to totally express themselves, it features internal Adjustable guitar strings which provides a smooth rhythmic sound production for a better musical experience Strings can be tuned from the bottom of the cajon.The metal ball can play a good performance in any sound mixing with very little strength.