Fixed-mount. Power Spray Plus Pulsating Massage: Unwind. Soothe. Invigorate. Installs in Minutes: On any standard shower arm. No pipe tape needed. See instructions inside. Flow Regulator: Flow does not exceed 2.5 gpm at 80 psi. To improve performance with low household water pressure, flow regulator may be removed. See instructions. OptiFlow is designed to increase water force up to 30% by optimizing water flow, so you feel refreshed and invigorated. 5 Unique Spray Settings: full-body spray; slow-massaging pulse; fast-massaging pulse; combo massage + spray; misting spray. Instructions in English, Spanish and French. ASME A112.18.1. 2.5 GPM maximum. 9.5 LPM maximum. Made in China.