TYREDOG TD-1400A-X4 - Manual (Page 16)

V1.0-FB06 (1105232) 16
Insert batteries in sensors
Battery installation for tire pressure sensor
A. Take away sensor cap in anti-clockwise direction.
B. Insert lithium battery and make sure battery polarity correct when
insert it.
Right now, monitor will receive signals from corresponding sensors
and report pressure value on the screen. At first, you will find that
the value shows “00.0”. It is because sensors have not been
mounted yet. The screen could show as below：