I just bought the BP Doctor Pro 13 Circle Dial Wearable Blood Pressure Smartwatch. It is also a smart watch with blood pressure monitoring function, which is achieved through an air bag strap. By using "BPD" I also received a 10% discount.
Xiaomi has unveiled the Watch H1, its first smartwatch that can serve as a wrist-based blood pressure monitor. Arguably a competitor to the Huawei Watch D, the Xiaomi Watch H1 can also take ECGs, measure skin temperature and function as a regular smartwatch.