• [Tubing Quick Release] The mask can be quickly disconnected from the tube, which is convenient for working without removing the mask.
• [Elbow With Swivel] Quick-release elbow that reduces tugging along the mask.
• [Perfectly Adapted size] Diameter and size are fully compatible with DW.
• [No Noise] There is no noise disturbing sleep no matter when plugging into head frame or into the hose or during use at night.
• [Prevent Air Leakage] The perfectly fit size further avoids air leakage, and the connection is tight to prevent falling.