01:Here is tips special for you:WiFi Dongle Support Systems: Windows 10/8/8.1/7/Vista/Xp, Mac 10.5-10.15 ,Not support TV,Projector,Printer .you can connect with 802.11 ac 1200 Mbps 1750 MBPS router 02:WiFi Antenna:When signal is weak, you can turn the antenna 60 degree tilt,the signal of wireless USB WiFi adapter for desktop computer will better.B: The WiFi adapter for desktop speed max. speed up to 867Mbps just works when wireless WiFi adapter connect to 5G band, otherwise, the wireless card will just run at the max. speed of 300 Mbps with 2.4G. Normally, your PC's network speed can't up to the WiFi USB adapter's speed as it depends on many factors, Such as the network size，router, barriers, laptop or desktop or PC 's internal memory 03: 5 GHz mode stands out within short range. If your wireless card is closed to the router, then WiFi signal will be stronger under 5 GHz than 2.4 GHz .Now You want to have fast speed in watching video and playing online games, We suggest that you should connect;wireless USB adapter to the 5G band. If your wireless USB is far away from the router, and you just want to surf the internet, you’d better connect to 2.4G band for better and stable signal. 04: This USB WiFi adapter for desktop only can receive network signals, but can not strengthen it, If you want to get booster function, then you choose a WiFi extender not WiFi USB adapter for PC E: It is different for the program between our USB network adapter with notebook's built-in 5 GHz wireless adapter,The ability to receive WiFi for notebook with built-in network card is weaker than mobile phone, While external network WiFi card is not better than notebook.The same router,From the ability to receive WiFi,the speed of the phone will be faster than Desktop or laptop. 05: Don't shaking and frequently plugin and unplugging,which may be cause looseness.