The jSax follows traditional saxophone fingering patterns, allowing children to develop a saxophone approach and playing skills early on. It has a surprisingly soft saxophone sound and is also enjoyable for an experienced amateur saxophonist to play. Like all other Nuvo instruments, the jSax is tuned in C, enabling it to play along with all WindStars music pieces. It has a fully chromatic range from middle C to G in the next octave. For beginners with small fingers, there is a set of plugs (training wheels) that can seal the tone holes during the first days of learning.

The jSax is lightweight and super durable, and it is 100 percent waterproof, making it very suitable for both lessons and travel. The jSax uses standard Nuvo reeds with strengths of 1/2 and 2, which are included in the kit. It can also use an Eb clarinet reed, and some soprano sax mouthpieces fit as well. You might also want to try the synthetic reed from Légère, which fits all Nuvo instruments. The jSax comes with a sturdy, blow-molded case, a carrying strap, and a fingering chart.