1. Register Administrator Fingerprint: Briefly press the SET button. Status indicator #4 turns blue. Press OK to confirm. The fingerprint module's LED will flash. Place the same administrator finger on the sensor multiple times until you hear music, indicating successful registration. Continuous fingerprint registration is supported, allowing for up to 10 administrator fingerprints. 2. Administrator Registration Complete: Once all administrator fingerprints are registered, the module will automatically exit administrator registration mode after hearing "DiDiDi". Pressing the SET button again will initiate user fingerprint registration. Administrator fingerprints are indicated by a purple LED ring, while user fingerprints show a blue LED ring. 3. Delete User Fingerprints: Press the administrator's fingerprint until the module displays a red light and you hear "DiDiDi" music, signifying that user fingerprints have been deleted. Restore Factory Settings: Repeatedly press the SET button until status indicator #4 turns red. Then, long-press the OK button until the fingerprint module flashes red rapidly and plays music, indicating the reset is complete. 4. Register User Fingerprints: Press the administrator's fingerprint until the module displays a blue light and plays music, signaling that you can add user fingerprints. Place the user's finger on the sensor multiple times until you hear music, confirming successful registration. 5. How to Use Relay 1: Briefly press a registered user fingerprint. The fingerprint module will display a green light. How to Use Relay 2: Long-press a registered user fingerprint. The fingerprint module will display a blue light. Power Supply: DC 30-75V Standby Current: 3.5mA Fingerprint Capacity: Admin Fingerprints: 10 User Fingerprints: R503/R502-F: 190; R558/R558S: 110 Output: Relay Relay Modes: Self-locking, Ignition, Jog KS220-L features 2 relays and operates on DC30-75V. Supports three relay modes: Jog, Self-locking, and Ignition. Helpful Tips: For automotive applications or situations requiring high security, we recommend the R503 or R502-F models. (Factory default settings: Relay #1 is in self-locking mode, Relay #2 is in ignition mode.) Important Note: All fingerprints can be used in factory mode, but functionality will be disabled after fingerprint registration. Material: Plastic Color: As shown Package Contents: 1 x Fingerprint Control Board 1 x Fingerprint Module Only the above package content is included; other products are not. Note: Light reflections and different displays may cause the color of the item in the picture to differ slightly from the real thing. The allowed measurement error is +/- 1-3 cm.