Engineered for localized continuous regional anesthesia and post-operative pain management, the Avanos Medical CB004 ON-Q* Pain Relief System with Select-A-Flow* Variable Rate Controller provides controlled, non-opioid pain relief directly to the surgical site or nerve plexus. Featuring a 400 mL elastomeric reservoir, this elastomeric infusion pump operates silently without electrical power or batteries, relying on constant pressure from its elastomeric membrane to deliver local anesthetics continuously. The integrated Select-A-Flow* variable controller enables clinicians to adjust flow rates between 2 mL/hr and 14 mL/hr, allowing tailored pain relief based on individual patient pain scores and recovery protocols.