Amazon.com: WiFi Router 1200Mbps, WAVLINK Smart Router Dual Band 5Ghz+2.4Ghz, Wireless Internet Routers for Home & Gaming with Amplifiers PA+LNA | 2x2 MIMO Antennas | Support Router/Access Point/WISP Mode : Electronics
Amazon.com: WAVLINK AC1200 WiFi Router Dual Band (2.4GHz+5GHz) WiFi Router for Wireless Internet,Gigabit WAN/LAN Ethernet Port Wireless Router with 4x5dBi High-Gain Antennas,Support Router/Repeater/AP Mode : Electronics
Amazon.com: AC1200 WiFi Extender Up to 2640sq.ft and 30 Devices, Up to 1200Mbps, Dual Band 2.4G 5G WiFi Range Extender, 2 Ethernet Ports, Internet Booster, Wireless Repeater,Works with All Router Modem :
WiFi Extender, 1200Mbps WiFi Booster, Wireless WiFi Extenders Signal Booster for Home, 2.4G & 5G WiFi Repeater Internet 360° Full Coverage Range XTD WiFi Booster and Signal Amplifier with 4 Antennas - Walmart.com
8w 2.4ghz WiFi Wireless Broadband Amplifier Router Power Range Signal Booster for sale online | eBay
5 GHz vs 2.4 GHz wireless frequencies | by Aman Khandelwal | Medium