Sundial RF² Pack 1 (Y9120H1009) contains: Wireless enabled timeswitch (ST9120C) Wireless room thermostat (DT92E) Ideal for adding a room thermostat to a combi boiler or an individual heating zone. Features Energy saving TPI control (see FAQ TPI Control) Wireless enabled upgrade Two way wireless communication Wireless signal strength indicator Built in Economy or Comfort programmes on ST9120C LoT display ...more >>

Sundial RF² Pack 2 (Y9420H1008) contains: Wireless enabled programmer (ST9420C) Wireless room thermostat (DT92E) Ideal for adding a room thermostat to a traditional system. Features Energy saving TPI control (see FAQ TPI Control) Wireless enabled upgrade Two way wireless communication Wireless signal strength indicator Built in Ecomomy or Comfort programmes on ST9420C LoT display for easy programming on ST9420C ST9420C ...more >>

Sundial RF² Pack 3 (Y9420S1005) contains: Wireless enabled programmer (ST9420C) Wireless room thermostat (DT92E) Wireless cylinder thermostat (CS92A) Ideal for adding a room thermostat and a cylinder thermostat to a traditional system. Features • Energy saving TPI control (see FAQ TPI Control) • Wireless enabled upgrade • Two way wireless communication • Wireless signal strength indicator • Built in ...more >>