The device: TP-Link RE650 — AC2600 Dual-Band Wi-Fi Range Extender (Wi-Fi 5 / 802.11ac). Works as a range extender or Access Point.
Basic specifications (from the company, not my imagination):
• Theoretical speed: Up to 1733 Mbps on 5 GHz + Up to 800 Mbps on 2.4 GHz
• 4 external antennas
• One Gigabit Ethernet port
• Working modes: Range Extender / Access Point
• Buttons: WPS, Reset, LED, Power
• Approximate maximum power consumption around 12 watts
• Wireless security: WEP and WPA-PSK / WPA2-PSK
• Management: Tether app or web interface
• OneMesh: Works as a unified mesh network only if the router itself supports OneMesh from TP-Link