Button boxes carry the widest effect list of any DNR device, because a button box is usually where the car adjustment controls live. Open Daniel Newman Racing > Button Boxes > Button Effects and click a button.

Lights and visibility: Headlights, Flasher, Headlights and Flasher, Rain Light, Left Indicator, Right Indicator, Hazard Lights, Wipers.

Car systems: Ignition, Engine Start, Ignition and Engine Start Combined, DRS, KERS, Push to Pass, Pit Limiter, Parking Brake, ERS Mode, Low Fuel Alarm, TDM Toggle.

Adjustment pairs, one button each for up and down: TC Increase / Decrease, TC Cut Increase / Decrease, ABS Increase / Decrease, Engine Map Increase / Decrease, Brake Bias Increase / Decrease, and Fuel Adjust Increase / Decrease.

Manual: Momentary Press and Latching Toggle for controls the game reports nothing about, plus Kill LEDs for a button that blacks the box out.

iRacing pit service: the full pit panel, including Refuel, No Refuel, New Tyres, No Tyres, the four individual corners, Tyre Compound Dry and Wet, Clear Pit Flags, Fast Repair, Windshield Tear Off, Pass Left, Pass Right and Auto Fuel.

Per button colours need the Custom theme and are overridden by Universal Theme.