Beta: 12-30Hz   Beta waves are characterized with high functioning, alertness,   and normal waking consciousness.

Alpha: 8-12Hz    Associated with wakeful relaxation, Alpha waves are present during daydreaming.  Great for visualization, and mental creation.

Theta: 4-8Hz    Creativity, inspiration, intuition, and connection with your inner self, are generated within the Theta state. Theta waves occur during wakefulness and sleep. 

Delta: 0.5-4Hz    Deep, dreamless sleep associated with bodily healing, regeneration, and overall health. Delta waves are rejuvenating for the body

and mind.