Anbee Tello WiFi Range Extender, Xiaomi WiFi Repeater 2 Amplifier Universal Wi-Fi Extender 300Mbps 802.11n Wireless WiFi Signal Extender for Tello Drone
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Built-in 2 antenna, transmission rate could as much as 300Mbps.
180° rotation USB interface, easy to find best direction to place.
Compatible with most routers, it’s easy to set up and pair, Should you use this outside, please plug it to a power bank.
Strengthen multi-level cascade (or more than one connections on the same level), unlimited collection of specific. But too much cascade will seriously impact the speed
This works well for Ryze Tello and Tello EDU Drone, WIFI range extended by practical testing. Video on Youtube: https://www.youtube.com/watch?v=ALlh1PRBb9Q&feature=share