Once installed, the A3 is ready to use. The aluminum of the unit matches perfectly with the brushed aluminum of the SN45G, although the beige CD drive gives an odd appearance to the whole system. On the left of the A3 are the two knobs that control fan speed. The knobs are small and slightly difficult to turn due to their size, especially for someone who has large hands such as me. The LCD screen sits in the middle of the unit and to the right are three buttons: mode, set, and reset.