I guess no since it's a 2011 product

Hi the utility can help you.it can be downloaded from the website http://www.tp-link.com/en/download/TL-PA4020P-KIT.html#Utility

Hi please tell what's the model number , it's begin with TL like TL-WA850RE as I know,the 300Mbps extender only support 2.4G

Jaydon wrote Thanks, but how to open the Installer_RTL.pkg ? hi I guess you download the wrong file,pkg file is for mac OS,please download this TL-WN823N_V1_140918

did you download the driver from the official website? maybe you can try this: http://www.tp-link.com/en/download/TL-WN823N_V1.html#Driver the last one is for windows

have you tried pair them again by push the pair button? if still can't pair,try to reset by push down the pair button for 15sec or you can try to add the device manually by utility (tpPLC) ,it can be...