How do I receive multiple signals simultaneously at a single receiver (433MHz) with multiple transmitters ? I am working on a polling system. This one is similar to the audience poll system using clicker devices.

When i google for power consumption 433mhz 2,4ghz and similar most results tell me that 433MHz consumes less power... but when I look at specifications of explicit chips/modules I can't seem to find a 433MHz module that use less power than the 2,4GHZ…