Chongqing Fugui Electronics Co.,Ltd. on my network and I cant find It

I was looking through the devices tab on my pi hole adblocker today to check something and I saw this device wich showed as Chongqing Fugui Electronics Co.,Ltd. Ive looked it up and no info it sounds so dodgy so I thought to block it but I cant my router doesnt see it the app for my router doesnt see it nothing sees it but my adblocker so I cant block it but I want to as I want to see what it is and if its something nefarious. if anyone can help any info will be much appreciated.