... Green environmental protection 4.Mercury free ¨ OVERVIEWLED bar graph sphygmomanometer is a new generation mercury-free blood-pressure meter ... digital tube, and LED bar graph as reference, completely solves the pollution and the harm of mercury. LED bar graph sphygmomanometer ... , easy for use, durable.The LED bar graph sphygmomanometer conforms to the requirements of the European Directives based ...