iKey PM-81 is a keyboard designed to withstand harsh environments and intensive use. Its rugged construction and durable materials make it suitable for various applications, including industrial, medical, and military settings. The PM-81 offers tactile feedback with a mechanical snap for precise and responsive typing and can endure over 10 million cycles of use. Its temperature range spans from -40°F to +158°F (-40°C to +70°C), ensuring reliable operation in extreme conditions.