1. Register Administrator Fingerprint: Short press the SET button, the No.4 status indicator shows blue, then press OK button to confirm, now the fingerprint module LED flash, put the same admin finger with multiple times in fingerprint collection area until hearing music means fingerprint register successful. Fingerprint can be registered continuously and it can register 10 pieces administrator fingerprint; if no need to adding fingerprint more, a few seconds to exit. 2. If the administrator is fully registered, it will be automatically exit the administrator registration state after hear "DiDiDi". It will start register user fingerprint if press SET button again. Admin fingerprint don't have unlocking function, only used for register or delete fingerprint. Admin fingerprint shows purple ring LED, user fingerprint shows blue ring LED. 3. Delete User Fingerprint: Press the administrator fingerprint until the module shows red indicator light and hear "DiDiDi" beep and music, means user are deleted.Back to factory default: Short press the SET button again and again, until the NO.4 status indicator shows red, then long press the OK Button until the fingerprint module shows red indicator light flash fast and hear music means initialization operation successful. 4. Register User Fingerprint: Press the administrator fingerprint until the module shows blue indicator light and hear the music, means can add user fingerprint. Put the same user finger with multiple times in fingerprint collection area until hearing music means fingerprint register successful.Fingerprint can be registered continuously when system in register state; if no need adding fingerprint more, a few seconds. 5. How to Use Relay 1: Short press registered user fingerprint. Fingerprint module shows green light.How to Use Relay 2: Long press registered user erprint. Fingerprint module shows blue light. Power supply: DC 30-75V Standby current: 3.5mA Fingerprint capacity: Admin Fingerprint: 10 pieces User Fingerprint: R503/R502-F: 190 pieces R558/R558S: 110 pieces Output: Relay Relay Mode: Self-locking Mode, Ignition Mode, Jog Mode KS220-L have 2 relays, the power supply is DC30-75V. Have three relay mode: jog mode, self-locking mode, ignition mode. Helpful hints: If need to connect with car, motorcycle, and needs high security product, suggest to chose R503, R502-F. (In factory working status, the No.1 relay in self-locking mode, the No.2 relay in ignition mode.) Note: Any fingerprint can be used in the factory state, but the function will be invalid after the fingerprint is registered. Material: plastic colour: Package Contents: 1 x Fingerprint Control Board 1 x Fingerprint Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.