Review on 🔌 Techkey USB WiFi Adapter 1200Mbps for PC - Mini Wireless Network Adapter USB 3.0 802.11ac with Dual Band 2.42GHz/300Mbps and 5.8GHz/866Mbps - Compatible with Desktops, Laptops - Windows XP/7/8/8.1/10, Mac OS by Ahmed Rowe

After I disabled my laptop's Wi-Fi antenna and installed the Realtek drivers and utility software, I had connection issues about 20% of the time. Additionally, the Mbps reported over the internet were either slow or slowed down during testing, averaging just 100 Mbps. I removed the wireless USB adapter, uninstalled the Realtek drivers and utilities, and rebooted. I then reconnected the USB adapter to allow Windows 10 to install the Microsoft-blessed drivers. The network interfaces dialog in Windows 10 shows up to 867 Mbit/s (ie works as intended). However, I see a maximum of 250 Mbit/s with online tools such as Speedtest. I find AT&T's gigabit network to limit my connection when running tests like this, but that's another rabbit hole.