Both Rich Bit Fat Tire e-bike models TOP 12 and updated version which is RT 022 comes with computer TC488 display. Below you can see the LCD display manual which should help you to familiarise with the e-bike controls.
Work Voltage: 36v/48V (lithium battery)
This LCD display is configured for DMHC controller and also comes with DMHC high precision speed sensor.
Configured/adapted for the Rich Bit 022 and Rich Bit 012 motor, which allows to show speed more accurately.