Wireless Charger: Work with Xiaomi Mi9, the power is up to 20W 
No limitation Wireless Design: Eliminate the wore,let you enjoy a convenient charging 
Foreign Object Detection: Metal objects smart detection and over temperature power off function to avoid accidents 
High-speed Charger: Support XIaomi Mi 9/ Mix 3/ iOS phone which support Qi EPP protocol 
Super Slient Fan: Cooling fan + heat sink heat dissipation system provides a comfortable and silent environment
For More : https://www.mi.com/us/mi-wireless-charging-pad