Exclusive Multifunctional Intelligent Protect Technology provides temperature control, surge protection, short-circuit prevention. Besides that, this wireless chargers is made of ABS Material which is fire-resistant, and has a UL Certificate, you can purchase it at assurance. Double guarantee and dual safety provide you safety experience. To get better experience, we would like you to take off the phone case and use the adapters recommended .Indicator will flash for 3s if power source is connected, then turn on for 16s if recognizes your phone well. Entering charging mode, light will turn off and keep the whole charging process SLEEP-FRIENDLY.