Main control utilizes dual-function pressure balanced cartridge. Monitor pressure balance valve keeps water temperature within a safe ±3° F (±1.6° C), helping to protect you from sudden changes in hot or cold water pressure. Dial controls temperature. Bottom handle controls on/off and adjusts volume. Top handle controls diverter functions. 2 individual positions, 1 shared positions. Three function shower diverter. Recommended rough-in kit R22000. Trim kit only, must order MultiChoice Universal Valve separately to complete the unit. Lumicoat finish easily wipes clean without cleaners and chemicals.