The Fisher & Paykel SleepStyle Device Lid with Handle is a replacement component designed for use with all F&P SleepStyle Auto CPAP Machines. It should be replaced if the original is damaged or broken. This lid is an essential part for maintaining the functionality of the SleepStyle Auto CPAP machine. Compatibility: The device lid is specifically designed for use with all Fisher & Paykel SleepStyle Auto CPAP Machines. Purpose: The device lid should only be replaced if the original is broken, appears damaged, or will not seal properly. Sleepstyle machine is not included picture used for illustrative purposes only This product is an accessory to a CPAP machine, which assists patient breathing while sleeping, for the purpose of treating Obstructive Sleep Apnea (OSA). This is by the delivery of Continuous Positive Airway Pressure (CPAP) in order to prevent airway obstruction. ALWAYS FOLLOW THE DIRECTIONS FOR USE.