https://store.fut-electronics.com/
Grow K202 + R503 DC12V Fingerprint Access
How to Use:
1.
After providing power to the module, the module will be in its initial
factory mode where any fingerprint can activate the relay.
2.
To register the fingerprint long press the SET button for 3-4 sec,
when the BLUE LED starts blinking it indicates that the module is
ready to register the fingerprint.
3.
Now place the finger which you want to register on the scanner and
after the 5 beeps remove the finger. If you want to add other
