This is the gray button next to the LED indicator lights on the ELD. If the driver logs into the application while the vehicle is in motion, they will be prompted with an alert: "Movement is currently...This is the gray button next to the LED indicator lights on the ELD. If the driver logs into the application while the vehicle is in motion, they will be prompted with an alert: "Movement is currently detected. Screen will remain locked until movement has ceased and history is read". Once the vehicle is stopped, the driver will be prompted with the option to enter their trailer and shipment information, if applicable.