Radiator Thermostat Starter Kit + Extension Kit without buying Wireless Thermostat

Hi, I have a question about possible setup for my home. I have 4 rooms in my flat with 4 radiators. And wireless thermostat as well, which controls a boiler, which is placed outside my flat. I want to have Smart Radiator Thermostat in each room and my question is: do I actually need Smart Wireless Thermostat Starter Kit (with wireless receiver)? Or it's enough for me to buy Smart Radiator Thermostat Starter Kit (plus 3 extra valves) and Wireless receiver?