Lighttells CM-100+ portable coffee roast analyzerCM 100plus, is the best portable coffee roast analyzer, with its high accuracy and stable meter which helps you to classify roasting degree or the delta between whole bean and ground to get better understanding of the roasting curve and roasting result for better quality control. CM 100 plus has following advantages: supports quick measurement key, high accuracy measurement result, long battery working hours ( up to 6 hours of continuous use), easy to