Environmental test chambers simulate the effect of conditions such as temperature, humidity, air pressure, light, and motion on a product. The environmental chamber can be used to study product performance under a given set of conditions, or to accelerate product lifetime and study the product aging process. An environmental test chamber typically does not include all possible features, but is designed to simulate a specific environment or conditions--such as temperature, humidity, and light; or vibration and soaking. Specialized units can model extremely cold environments down to -80C or temperatures as high as 212C. Environmental test chambers can be used to model almost any environment, from the high arctic to the desert to the rainforest. Features to look for in an environmental chamber include accurate and precise temperature controls, adequate size for your needs, and sufficiently rapid temperature change rates for your conditions.