Qi Wireless Charging Pad + Wireless Receiver Kit for Samsung Galaxy S4 Yellow Universal charging ability. The inductive charger has Qi, the new universal standard for charging. You can charge any Qi-enabled device. Freedom of Placement: No annoying magnets to align or secret spots to find in order to charge your device This portable and light-weight Qi standard wireless charger pad is fit for various kinds of smartphones which are Qi-enabled. Easy to use, place QI-enabled device in the charging area to begin charging. Please read the User Manual carefully before use. Some smartphones need an extra receiver module. In order to get the prefect wireless charging experience, please Use wall adapter with output rating of at least 1.5A (1500mA). It's normal for the pad and phone get warm slightly during inductive charging, and they may get even warmer, if you use your phone during charging, for example using GPS or playing games, music etc. It is suggested to remove protective cases during charging.