Hi @harishkumar_888
Welcome to HP Forums, this is a great place to get support, find answers and tips, Thank you for posting your query, I'll be more than glad to help you out:)
As I understand you have lost the USB receiver for your Wireless keyboard and the mouse and you would need help with this, I'll be really glad to help you.
I would like to inform you that, you need to purchase a new keyboard and mouse as the wireless receivers are not sold separately.
You could either purchase it online by visiting our HP Part store or you could contact our HP phone support.
I hope this answers your question. let me know if you need any further assistance. I'll be more than happy to help.
Feel free to post your query for any other assistance as well,
It's been a pleasure interacting with you and I hope you have a good day ahead.
If you wish to show appreciation for my efforts,
mark my post as Accepted Solution.
And click on the Purple Thumbs up icon at the bottom of my comment.
Regards,
Jeet_Singh
I am an HP Employee