Updated Version: Come with an AC power supply indicator and udpated AC power supply solution, it is compatible with more devices and easy to find out whether the AC power supply is on or off. With a built-in 2-prong AC output for devices up to 50W, this portable power outlet allows 110V electronic devices like GoPros, printers, table lamps, vacuum cleaners, and small fans to recharge anywhere. Please check if your device(s) being charged fit within these requirements to ensure compatibility. Type-C 5V/3A & USB 5V/2.4A Outputs: Type-C and iSmart USB allows for the fast and simultaneous charging of two devices including a MacBook and an iPhone 7 also works as a portable charger for smart devices. (Type-C port only supports output, does NOT support input). To turn ON the AC power you must hold the power button for about 8 seconds Cylinder Size With A 20100mAh Capacity: A huge 20100mAh battery fully charges an iPhone 7 6 times, a Galaxy S7 4.6 times, or the 12 MacBook 1.3 times. It is suggested to use the original AC adapter and charging cable when charging your laptop or other electronic devices Save 60% Off The Recharge Time: Through the 19V/1.6A DC input, youll have full power in just 4 hours – compared to the standard 10 hours from a 2.4A charger 5 LED lights indicate remaining battery, while the ON/OFF switch removes operation confusion Triple Protection + Safer Use: Includes overcharge, short circuit, and current surge protection air vents for safer heat dissipation and a dust cover to prevent dust entry. If you have any question about the usage, please contact RAVPower customer support for more information.