The Heatmiser RF Switch v2 is a surface-mount wireless receiver that controls 2 heating zones and 1 hot water zone from a single unit, giving you wireless zone control without running extra wiring back to a central point. Zones: 2 heating zones + 1 hot water zone Compatibility: Slimline-RF v3 and neoAir v3 thermostats; pairs with the UH8-RF v2 wiring centre for a wireless link to the boiler; NeoPlug compatible (RF only) Mounting: surface mount (not DIN rail) Electrical supply: 230V AC, 50Hz, 1 phase Load rating: 3A resistive per relay, 9A resistive total Protection rating: IP20 Dimensions: 108 x 90 x 24mm, 166g Warranty: 2 years direct from the manufacturer Boost function supported. Suitable for both new installations and adding wireless zone control to an existing Heatmiser system.