The Optimum Vibe – model OP-WFSTAT is a Wi-Fi & radio frequency battery-powered programmable room thermostat with touch-screen controls, providing four timed temperature periods every 24 hours. The transmitter (Tx) has a large blue backlit display and runs a pre-programmed user adjustable temperature profile. Users can just touch the up or down control icon at any time to manually adjust the current temperature setting. The Wi-Fi & radio frequency receiver (Rx) must be wall-mounted adjacent to the boiler, has auto-recognition open therm connections and volt-free switching; indicator l.e.d. lights showing power and load status and has a button for manual operation if required. The control set uses 2.4GHz Wi-Fi and the license-free 868MHz frequency and is pre-linked in the factory with a unique code. TEMPERATURE REGULATION MODE: ON/OFF ~ OPTIMISING ~ T.P.I. WiFi / RADIO FREQUENCY PROGRAMMABLE THERMOSTAT iOS / ANDROID SMART PHONE APP EQUIPPED FOR WALL MOUNTING OR TABLE-TOP USE WALL-MOUNTED RECEIVER OPEN THERM OUTPUT and VOLT-FREE SWITCHING SUITABLE FOR COMBINATION BOILERS CLASS VI CONTROL, 4% SYSTEM EFFICIENCY CONTRIBUTION BACKLIGHT AUTO or OFF.