This Poolee design comes with reliable LED light. It is very durable and long-lasting. When fully charged, it charges an iPhone 11pro max for up to 4 times. It is very easy to use. Connected with Micro USB port. It can be used flexibly. It is compatible with all operating systems. Poolee P20 Power bank 20000mAh capacity is of good quality and strength. Enough power to keep you going for at least 2 days. High-Speed Charging Technology Power IQ ensures intelligent high-speed charging for all your devices and Voltage Boost prevents cable resistance from slowing your charging speeds.