The Parkfield 15W Eco-Friendly Wireless Charger provides four charging modes (15W / 10W / 7.5W / 5W) and is compatible with Qi devices. The Parkfield provides safe charging with under and over temperature control, over-voltage and over-current protection, short-circuit prevention, and foreign object detection. It will detect abnormal conditions and stop charging to prevent dangerous situations like overheating. It comes with the international Qi standard A11 coil and high-efficiency chipset.