Every aspect of this product was designed for wearability and comfort. Quell is as discreet as it is powerful. Quell’s OptiTherapy™ calibrates to your optimal stimulation level ensuring you receive maximum relief. It knows what level of stimulation to deliver during the day and adjusts to the appropriate level at night. It senses when you are lying down and automatically switches to night therapy to ensure a restful sleep. Pain relief isn’t an occasional need. It’s an all-the-time must-have. Quell is designed to bring you comfort all day and all night.