OVERVIEW: The SRX is the newest model of Rainbow, which like all of the other past 2 speed models you can also use the SRX for both cleaning and air purification. One big difference between the SRX and the previous 2 speed models is the SRX now has 4 SPEEDS and a timer. This allows you to choose a certain amount of time you want the purification setting to run rather than having to manually turn the unit off like the past models. This also gives you more options for fan speed, so unlike the...