This is the Digi Q DX2 BBQ Guru for Big Green Egg.  Retail price is $199, the blower is $79 and the air intake adaptor is $29.  Very happy with the setup, it makes keeping the Big Green Egg temperature exactly at the temperature that you want.  This is ideal for long cooks at consistent temperature.  I recommend this to anyone that owns a Big Green Egg.  You can price shop for one here on Amazon.