Hello, Archer VR400 does not support airtime fairness function. Hope you understand.

Cause the current product is TL-WPA8730, to guarantee the performance, it is suggested to buy the 7/8 series, like TL-WPA7510, TL-WPA8630KIT TL-WPA8730 etc....

Glad to hear that you solved it finally. Thanks for your feedback. If need any further help in the future, just let us know.

TC-W7960 supports guest network, while there is no way to setup bandwidth control . You can refer to the user manual: https://static.tp-link.com/2017/201711/20171113/1910011917_TC-W7960(US)_UG_V2.pdf...

From the current situation, it seems that something went wrong about the physical installation. Instruction as below: https://www.tp-link.com/us/download/HS210-KIT.html#video...

please hard reset the KL110 first: 1. Turn the light switch controlling the bulb to the OFF position. 2. Flip the light switch on and off 5 times at a slower rate. Then please follow the instruction...