Operating Voltage: 48V - 72V DKD Adjustable Display w 3D Printed Mount: displays speedometer, odometer, battery level, power draw, voltmeter, gear / brake / headlight indicator, and controller errors. Razor mount works on crossbar and handlebar mount (31.8mm) attaches outside of the normal stem clamp. NOTE: The "one line" connection will either be the powder blue wire from the controller or, most commonly, the brown wire (referred to as boost wire in the schematics). The brown wire is in a two pin harness (next to the blue with red stripe wire) on the controller. Tuning Guides, Software Updates, Troubleshooting: Facebook Group "FarDriver Tuning for Ebikes" DKD Settings