What are the main physical components of a BOD incubator, and what is the function of each?

Key components include an exterior protective casing, inner chamber for sample placement, toughened glass window for observation, air circulation fan for temperature consistency, removable trays for sample arrangement, temperature sensor for monitoring, door hinges and handle with lock, PID temperature controller for precise management, analog ampere meter for electrical flow monitoring, pilot lamp to indicate working status, safety thermostat to prevent overheating, on/off MCB for electrical safety, refrigeration system for cooling, power cord, caster wheels for mobility, solid door to maintain a stable environment, and a heater for warming the chamber.