This sleep coach helps you fall asleep naturally, eliminating the need for sleep-inducing medications. The device projects a soft blue light that slowly brightens and dims; simply synchronize your breathing with the light, inhaling as it illuminates and exhaling when it fades. Relying on the same breathing techniques taught in yoga for relaxation and stress reduction, the device prompts you to take deep, slow, regular breaths to relax your muscles, slow your hear rate, and helps reduce the body's production of cortisol, known as the "stress hormone," to help you fall asleep. Unlike sleep aids that rely on sound, this will not disturb your partner and it fits in a shirt pocket for convenient travel. The unit can be set to turn off automatically after a 7- or 25-minute cycle. Includes one 9-volt battery. 3" H x 2 1/2" W x 1" D. (4 oz.)