The JRS Eco 100 Era comes with a default transmit power setting of 63 milliwatts. This is lower than standard routers, and you can reduce it further if you wish, or increase it, depending on the size of your home and how much range you want.

There are two separate sliders: one for 2.4 Gigahertz and one for 5 Gigahertz. All modern routers have 2 frequencies. The 2.4 Gigahertz has the best range, and the 5 Gigahertz allows you to achieve the highest Wifi speed, but 5 GHz is more attenuated by walls and ceilings.

If you want, you can also switch off the 5 Gigahertz completely. You can do this with the red Disable button on the Eco 100 Wifi -> Wifi Networks page. See How do I change the wifi password, name, or other settings of a wifi network on the JRS Eco 100 Era?