Description:

' Qi is a trademark name for a thin and smart inductive charging system. Many large gadget companies have standardized on Qi, which means it's easy to find a charging dish and we thought it might be cool if your Arduino project can recharge itself wirelessly.
We've added a ton of Qi receivers but, until now, we haven't had a charging base. No longer! This is a super simple Qi transmitter. It will work with any standard Qi charger receivers - like the ones we carry here. You just connect the board to a 5v power supply - either through a micro USB port - then put your device w/ Qi receive onto the base. If you want to 'share' the microUSB power connection, you can also connect direct to the USB-A port 

Datasheets: UNIVERSAL QI WIRELESS CHARGING TPdf