Wireless accessories are sold at very affordable prices in Chinese online stores, so
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Xiaomi Mi WiFi Repeater Pro Extender - prettyA cheap option that allows you to increase the signal range. He has 2 external antennas 2x2dBi, speed 300Mb / s, support for a large number of routers. This repeater is capable of supporting 64 devices at once, so don't worry about it.
You can buy it from the Cafago online store for $19.98. If you need a strong signal, then this repeater is a great option.