The Z1 Unplugged Auto CPAP System builds on the form-factor of the <strong>Z1 Auto CPAP</strong> to deliver the world’s smallest, lightest, most integrated auto-cpap machine. At only 10 ounces the Z1 Auto is the best machine we have released and when integrated with the PowerShell™, the Z1 Auto delivers an amazing night’s sleep on a single battery charge.