Qi Wireless Charging FAQ 1. Does this support fast charging? No, the wireless charger(10W) support fast charging, but the receiver output is 5W(Max). so NOT fast charging. 2. Does it heat up when wireless charging? Yes, it will produce a little heat due to energy conversion, but not very hot. this is a normal physical phenomenon. 3. Can I use case after installing receiver? Yes, please use PC or TPU case, the receiver will be hidden after using case, please view the video about installation. 4. What are the factors that affect the charging speed? Many, such as: Wireless charger, Receiver, Wall adapter, Cable, Phone Battery Capacity, Poor connect of phone interface, etc. Please use high quality of the above products. 5. What are the advantages and disadvantages? Advantages: Wire free, Put and Charging, enjoy wireless charging, very convenient. Disadvantages: relatively slower than wired charging and a little heat when charging. Compatible with: > Samsung Galaxy M21 > Samsung Galaxy M21S > Samsung Galaxy M31 > Samsung Galaxy M31S > Samsung Galaxy M51 > Samsung Galaxy M12 > Samsung Galaxy M22 > Samsung Galaxy M32 > Samsung Galaxy M42 > Samsung Galaxy M52 > Samsung Galaxy M62 > Samsung Galaxy M13 > Samsung Galaxy M23 > Samsung Galaxy M33 > Samsung Galaxy M53 > Samsung Galaxy M14 > Samsung Galaxy M34 > Samsung Galaxy M54 Specifications: 1.Wireless Charger: Input:5V/2A; 9V/2A Transmission distance Material: Aluminum Alloy+Acrylic Color: Black 2.Charging Receiver: Output:5V/1A(Max) Charge efficiency: > 70% Interface: Type-C Standard: QI standard Wireless Charger