For obsession use the DAVID Delight Pro by Mindalive and the iLightz Pro by Mindgear/Mind Tools mindmachines. The primary advantage of using either mindmachine is learning how to relax. These are mindmachines for private use that will softly lead you from your standard waking state (beta) into more of a cool alpha or meditative theta state of mind or into delta for accessing sleep. Think of a mindmachine as being a private relaxation tool for overcoming dependence.