Input Voltage: 9-24V Output Voltage: 9-24V Standby Current: <1mA Maximum Output Current of the Whole Board: 8A Maximum Output Current of a Single Channel: 4A, Feedback Signal Interface: Detects the lock's open/closed status, Baud Rate: 9600 (manually adjustable), Unlocking Time: Default 250ms (manually adjustable), Communication Interface: RS485 communication, sends commands to control the electromagnetic lock via a host computer's RS485 interface. Cascading between lock control boards is supported. Load Interface: Controls the electric lock; each interface connects to one lock. Input Voltage: 9-24V Output Voltage: 9-24V Standby Current: <1mA Maximum Output Current of the Whole Board: 8A Maximum Output Current of a Single Channel: 4A Feedback Signal Interface: Detects the lock's open/closed status Baud Rate: 9600 (manually adjustable) Unlocking Time: Default 250ms (manually adjustable) Communication Interface: RS485 communication, sends commands to control the electromagnetic lock via a host computer's RS485 interface. Cascading between lock control boards is supported. Load Interface: Controls the electric lock; each interface connects to one lock. Color: As Shown Material: plastic Package Contents: 1*Control Board 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.