Can you send me a new one?
We are sorry to hear that the remote does not work, have you removed the protective transparent tab covering the remote (as below picture) to activate the battery?
If it does not work if you removed the protective tab, we will send a replacement to you, I just send you a private message.
 How to Set Timer on LED String Lights. KooPower Blog, Oct 29, 2019
Thank you! I just removed it, and the remote works now!
Great! Could you mark the answer as solution?