https://docs.emtronaustralia.com.au/accessories/em-8-button-keypad/index.html1.0 Description The Emtron 8 Button CAN Keypad provides a programmable switching solution which is available for all Emtron ECUs. The use of the CAN Keypad allows unique application-specific user controls to be included in the ECU control strategy. The buttons can be used for a variety of inputs from simple switching to binary selectable runtimes. Three LED lights are located above each button which are used to indicate the current state of the unit.Hugoen-us