With battery connectorFor Nav X replacement, must include PAS: ELCO3080PASS0026 If you sell one of these Controllers you will also need to add Front light:ELCO1430LIHT0015. They will just have to turn the light on using the button on the light rather than the display. Just one click and then they can use display button to function. Compatible with: Summit 27.5Summit 29Navigator 27.5Voyager 27.5