Aqualisa Digital Mixer Showers, like standard Mixer Showers, operate by mixing hot water and cold water to produce the desired temperature.  However, unlike Standard Mixer Showers, a Digital Mixer Shower offers control at the touch of a button.  So rather than having to adjust the temperature/flow rate using a manual valve control, Digital Mixer Showers allow you to adjust using a push button control system.  The digital control unit can even be positioned away from the shower to give you more space and flexibility.  Digital Showers are also capable of letting you know when the desired temperature is ready and you can simple step in and enjoy.