QI wireless charger smooth 15w $ 6.11 The most important functions: Metal foreign body detection. When a foreign object is detected, it will automatically cut off the flow. Foreign objects on one side will not affect the normal charge on the other side. The charging induction distance is less than 8mm. Support charging using mobile phone case. The silicone bottom and plastic coated surface are non-slip. Suitable for mobile phones with wireless charging.