Product Features:
Mechanical spring type, can be adjusted to Zero level with professional spanner.
Small volume for portable
The use affects will be same with mercury blood pressure monitor
With self-testing hoop armband

Working Element：
Press the test place and block the blood with the filling-air armband, then exhaust the air of armband, let the blood run again, the test of blood pressure is made according to the blood running noise again or the shocking change of blood vessel.

Main material:
latex

Technical specs:

Test scope：0～300mmHg(0~40kPa)
Basical error：±3.75mmHg