Agreed, Controlling car uses an infrared technology. By using thins technology we can control the device within a limited range as the infrared technology works on the infrared beams emitted from the target object surface. Infrared radiations gives very accurate information hence we can easily rely on the information obtained from this technology. That's why nowadays the technology is being used in the measurement industry. Infrared Thermometer is one of the best application of infrared technology.