The LASS-Expert therapeutic laser shower is primarily used for treating large areas (e.g., trauma, arthropathies, extensive muscular tension, and dermatological applications). It operates with 21 laser diodes of 100 mW each (2100 mW total output) in continuous operation, alpha, Nogier, Bahr, Reininger, and multifrequency modes, or at freely selectable frequencies. The 808 nm laser used has the best penetration depth and biostimulation valuesaccording to current scientific findings.