@Lars89 Hi, thanks for posting question here. As we know, TP-Link range extenders can be compatible with most common wireless routers. If you have troubles setting up the range extender, please check...

@NzSouth Hi, thanks for posting question here. I am afraid 400m is a over-long distance for normal home network devices. It is more recommended to seek proper products on our business community.

@EyeloMilo Hi, thanks for posting question here. According to your description, you may refer to this guide to check your situation. You may also contact local support for direct help.

@Leokem Hi, thanks for posting question here. If you feel slow internet speed on your devices with Deco network, it is suggested to follow this troubleshooting guide to confirm whether it is normal.

@TheBaron Hi, thanks for posting question here. When Decos are working as wireless router mode, there must be a main Deco which should be connected to the front-end modem or something else directly....

@Beckenpol Hi, thanks for posting question here. May I confirm whether you have a normal main router? A main router that you can connect your devices like phone/laptop to it without extra...