User's Guide

Factory Reset
Factory reset will erase all your settings and bring it back to default. After the factory reset,
your device will still in your Yolink account.
Hold the SET button for 20-25 seconds until the LED blinks red and blue alternately.
Factory reset will be done when the light stops flashing.
19
SET
Gas/ Water Valve
Model : YS4 907 -U C
Power : DC1 2V- 1.5 A
SET BUTTON