The technology used in the A&D UA-767, to measure blood pressure, has passed in a validation study, in a general population, according to a recognised standard protocol, as published in a peer-reviewed publication.
Rogoza AN, Pavlova TS, Sergeeva MV. Validation of A&D UA-767 device for the self-measurement of blood pressure. Blood Press Monit. 2000 Aug;5(4):227-31. PMID: 11035865.
BHS:1993 - Pass (A/A) General population
SP10:1996 - Pass General population
Davis PD, Dennis JL, Railton R. Evaluation of the A&D UA-767 and Welch Allyn Spot Vital Signs noninvasive blood pressure monitors using a blood pressure simulator. J Hum Hypertens. 2005 Mar;19(3):197-203. PMID: 15565174.
Measurements from the A&D UA-767 are compared to those from a simulator, though not in a formal validation.