Product details of Xiaomi Mi Wi-Fi Range Extender Pro - Black Main Features: Two powerful high-gain external antennas give wider coverage and better performance Wireless function, make your wireless coverage larger Compatible with other brands router Transmission rate: 300Mbps Support up to 64 devices to fulfill the needs of the whole family Manage your network settings easily with the Xiaomi Mi WiFi APP This amplifier will upgrade automatically without any setting Plug and play, easy to use 1 Months Warranty by HONESTIME International