The M6 Comfort uses the specially designed "Comfort" cuff to give the flexability of the std size and large size cuffs in one unit. Intellisense technology for fast comfortable measurement. Memory has date and time stamp. Irregular Pulse Detection: shows if irregular pulses are detected and only displays reliable results. Memory capacity for 90 memories. Clinically validated (BHS Approved International Protocol) Supplied with Comfort cuff (22-42cm), soft case and batteries.