There's little info available on these radios. The manufacturer has a specialty making wireless headphones and other automotive electronics. The company's logo however is identical to those displayed on the radio, so they should be able to get you what you need - or at least direct to where you can get it.
Contact UnWired Support by your choice of mail, email or telephone at this link.
I hope this helps - and good luck! Please rate my reply - thanks!
It blew a component. A technicians cost is high enough to make this a scrapper. It is cheaper to buy a new one.
FRS radios are so cheap, toss it and buy another one. Problem solved.