This charger is Qi certified and compatible with Qi enabled phones. Qi, pronounced as ÇHEE' from the Chinese meaning of 'circulatory life force' is now used to describe wireless power transfer using inductive charging over short distances. For most of the more recent phone models, this comes as standard. Older models may require a linked accessory (such as a case) or an adapter to charge using a wireless charger. Qi certification involves rigorous testing for compatibility, safety and reliability and must pass the required standards to be able to use the Qi mark.