Emma Kent, 24, tearfully pleaded guilty in the County Court on Wednesday to dangerous driving causing death.

She was trying to connect her phone's Bluetooth to the car audio when she struck 57-year-old Gareth Davies on Black Forest Drive at Macedon on December 10 last year.

"That's what I was doing that distracted me," Kent told police after the crash.

She said she was distracted for about 10 seconds.

Mr Davies' heartbroken daughters sobbed and brought people in the courtroom to tears as they recounted their loss.

"In the first 24 hours after I found out, it felt like the world and my life was ending," Rhea Davies told the court.

"I cannot put into words the amount of complete, consuming rage I feel towards the accused."

Before the accident, they had been looking forward to visiting Wales for Christmas with their father, who was born there.

"The last memory of my dad was coming into my room the night before the accident, so excited, telling me there were only two more weeks before we're going to Wales to see his family," Ms Davies said, through tears.

"My dad is permanently out of my life solely because of the actions of the accused in this crime."

Her younger sister, Ffion, said the memory of having to tell her grandmother of his death still haunted her.

"After my dad was killed, my whole world fell apart," she said.

Kent's defence said she had always pleaded guilty and was remorseful.

"It could hardly be said she was unaffected," he said.

The defence called for a community corrections order, but the prosecution argued the offending was serious and deserved jail.

Kent was remanded in custody for sentence on November 26.

Australian Associated Press