For optional USB adapter: it is recommended to choose adapter with output 5V2A Lightweight and handy Circular silicone anti-slip mat Excellent Regulation Chips to prevent your device from overcharging Put your Qi wireless charging capable smartphone down on the pad and charging

For optional USB adapter: it is recommended to choose adapter with output 5V2A Lightweight and handy Circular silicone anti-slip mat Excellent Regulation Chips to prevent your device from overcharging Put your Qi wireless charging capable smartphone down on the pad and charging starts Wireless design & dual USB outputs enable the charger to charge three phones simultaneously Charging way: Electromagnetic induction model from close range