Register Administrator Fingerprint:Press SET buttonshortly,system inadministratorregister statusandblueindicator light flash fast, put the same finger with multiple times in fingerprint collection area until hearing music meansfingerprint register successful.Fingerprint can be registered continuously.If no needforadding fingerprint, waitinga fewsecondsto exit. Register User Fingerprint:Press the administrator fingerprintuntilthe blue indicator light flash fast andhear 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. If no need for adding fingerprint, waiting a few seconds to exit. Delete User Fingerprint:Press the administrator fingerprintuntilthe red indicator light flash fast andhear"Di",move away the finger,the red indicator light flash slowly,press finger again,hear"Di-Di-Di"and music,means user fingerprints are deleted. Back toFactory Default:Long press the SET button until hear"Di-Di-Di"beep and release the button,means initialization operation successful. K236-A fingerprint control board, using battery box and circuit board integrated and low power consumption design. The power supply is 4 x AAA battery. Have administrator and user fingerprint function. Two output modes can be selected, suitable for electronic lock body, relay and other equipment. K236-A can be used with R502, R502A, R502AW, R503 fingerprint module. Fingerprint capacity: Administrator fingerprint: 20 pieces User fingerprint: 60 pieces Output: DC5-6V, 300mA Size:87 x 47.1 x 16.5mm Mode Selection:set by the toggle switch: [Right]:Output DC5V and keep 0.5 second; stop 5 seconds,then minusvoltage outputted and keep 0.5 seconds. [Left]:Keeping output DC5V until removing the finger. Note: 1.When the voltage is less than DC4.7V, the red light lightens, means the low voltage warning. 2.In the "[Left]" mode,when need to register/delete user fingerprint,after press the administrator fingerprint successfully,lifting the finger then press the same administrator finger again until the blue/red indicator light flash fast and hear the music,then it can register/delete user fingerprint. 3.Any fingerprint can be used when factory default, and this function disabled after fingerprint registered. Colour:black Material:plastic Package Contents: 1 x Fingerprint control board Only the above package content, other products are not included. Note: Light shooting 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.