The UB-351 Automatic Wrist Monitor benefits from a number of features developed by A&D for professional clinical use. A&D UB-351 has 90 readings memory function. It also incorporates the average value feature of stored data, as well as the WHO blood pressure classification indicator to allow users better control of their management programs. It also boasts A&D's IHB (Irregular Heart Beat) technology, pioneered by A&D in 2001 and incorporated into the full range of blood pressure monitors. This A&D technology is now used worldwide assisting in the opportunistic detection of arrhythmias - including Afib (Atrial Fibrillation).