Keep your home smelling fresh and welcoming all the time with Air Wick Freshmatic Odour Detect - Air Wick"s first compact automatic spray device with odour sensor technology. This breakthrough technology automatically detects and helps overcome unpleasant odours, without you having to think about it. Due to its innovative odour sensor technology, Air Wick"s Odour Detect seamlessy helps you to maintain the fresh and welcoming ambience of your home. * Constantly measures the levels of odour in the air whilst gently fragrancing your home * Automatically releases fragrance when an unpleasant odour is detected to help overcome it quickly * Has 4 adjustable fragrance levels: select from 3 fragrance settings and a sensor-only setting.