The independent coil improves charging efficiency and expands the plug-and-play detection range. The heat dissipation port on the back dissipates heat from the charger and cell phone. Wireless chargers provide a great balance between fashion and speed. Can be placed horizontally or vertically, you can reply to messages, watch streaming videos and work. Its design can also be used as a stand for ipad. Acoustic cavity structure enhance the volume of cell phones that are placed vertically, high external sound quality(not a speaker). With over-current protection, over-voltage protection and over-temperature protection as well as foreign object detection function. The charger base is equipped with a venting hole to ensure safe charging of the device.