A teenager in England with cerebral palsy has been left unable to communicate after thieves stole her computer.
An appeal for help in finding the equipment Miya Thirlby uses has been shared on social media by former British footballer Alan Shearer.
More than 2,000 people have retweeted an appeal for help in tracing the talking aid.
The 16-year-old from Plymouth, who also has epilepsy, uses a tablet with sophisticated equipment which generates speech from what she is looking at.
Her father Paul Johnson said the Accent 1400 cost around £5,700 (€6,400) and he is asking for information about where it is after it was stolen from his car outside the family home.
Can everyone who sees this retweet this please. My daughter had her speech machine stolen out of the car. Its her only way of communicating with us. It was very pricey so it cant be easily replaced. Poor girl now cant speak to us again!! #Nufc #getmiyasvoiceback #help #plymouth pic.twitter.com/7p9tTSMTWC— RIP Sir Bobby Robson (@PJ_NUFC) January 11, 2018
Mr Johnson, a 40-year-old business analyst, said: "I want to get the word out to get it back.
"Miya cannot talk but I get the feeling she knows it has gone, she uses it every day.
"It will be upsetting for her."
He said the thieves may have thought they were stealing a regular computer as it was stored in a laptop bag.
He was desperate to get it back for Miya as the software was specially adapted to work with her eyes.
The machine has pictures of her father, mother Kerrie Thirlby and her twin Macie and it says their names if Miya looks at the images.
He urged anyone who might know where it is to hand it in to a responsible person.
After Mr Johnson, an exiled Newcastle United fan, tweeted about the theft, people have offered to fundraise to buy a replacement, but he hoped to get the original computer back.