The technology used in the Transtek LS808-B, 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.
It is recommended by the ESH for self-measurement.
Liu ZH, Liu XY, Wu WJ. Validation of Transtek LS808-B for self/home measurement according to the European Society of Hypertension International Protocol revision 2010. Blood Press Monit. 2016 Dec;21(6):352-5. doi: 10.1097/MBP.0000000000000212. PMID: 27622888.
ESH-IP:2010 - Pass General population