The 420SP is the size of two VHS video cassettes stacked on top of each other. It is the lightest CPAP on the market. Best of all, it is built to last and backed by a two year manufacturer warranty which means that although it is a travel CPAP, you can plan on this little guy lasting as long as any other CPAP on the market. It is a great machine.
This model is no longer available. A suitable replacement for this single-pressure travel machine is the Z2 Standard Travel CPAP Machine. The Z2 is small, compact and lightweight— fits in the palm of your hand. It's also 29% quieter than the previous version, making it an ideal travel companion.