Trim plate includes temperature control knob with integrated adjustable high-temperature limit stop and shower outlet on/off buttons When pressed once, shower outlet turns on and button pops out, becoming a knob for water flow adjustment When pressed back in, water turns off and outlet button aligns with control plate surface; flow setting remains intact High-temperature limit setting for added safety Low-profile design with easy-to-clean water-resistant casing Requires three-port thermostatic valve with integral volume control (sold separately) Handles up to 8 gpm (30.3 lpm) flow capacity (rate may vary by installation)