The document discusses an ambient device that detects movement using an infrared light and PIR sensor, similar to an air freshener. When movement is detected within 5 meters, the device's electronics cause a heater to rise in temperature and release scent. The document also profiles a potential user, Karen Green, and suggests the device could help customers choose daily special drinks and attract them to return to the store. It would work by detecting movement and providing information to help people decide what to order.