Dual band usage instructionsThis is a dual band WiFi dongle there are something you should know before you make a complaint about speed.1) Dual band WiFi router is a must-have if you want to receive 5G signal2) The adapter's max speed up to 867Mbps just works when you connect to 5G band, otherwise it will just run at the max speed of 400Mbps with 2.4G. Normally your PC's network speed can't up to the wifi adapter's speed as it depends on many factors, such as network size, router, barriers, laptop or PC 's internal memory.3) If your computer is desktop speed is not ideal, you can try to insert the WiFi adapter into the USB3.0(blue) port of you PC that may assure the power supply.4) This WiFi adapter will not boost the speed of original router it just transmit the wifi signal.5) If your WiFi adapter is closed to the router and you want to have fast speed in watching video and playing online games, we suggest that you should connect to the 5G band. If your WiFi adapter is far away from the router and you just want to surf the website you?d better connect to 2.4G band for better and stable signal.Frequently Asked QuestionsQ: I don't have a CD player to read the driver what should I do? A: An USB flash drive is included instead of CD easier access to driver Or we are avail to send you driver link once being contacted.Q: If the connection is unstable what's wrong?A: Try to reinstall the driver. And please check signal strength and signal channel, ensure that they are full to get high speed. Don't use the wifi adapter too long restart once a week.Q: What should I do when it seems not working?A: If you use our wifi adapter on PC, please make sure connect adapter to the computer back not front. And if you use on laptop, please make sure uninstall other wireless network card then install our driver.