Key Features of the 4-Port USB Charger Simultaneous Fast Charging for 4 Devices Equipped with 4 ports and a maximum output of 40W. Can charge multiple devices such as iPhones, Androids, AirPods, and Apple Watches with a single charger. Eliminates the need to fight over outlets at home or in the office. 45% Improved Charging Efficiency Each port provides a maximum output of 5V/2.4A, approximately 45% faster than standard chargers. An iPhone 12, for example, can be fully charged in about 1.2 hours. Proprietary iSonic technology automatically detects connected devices and provides optimal current for fast charging. Ultra-Compact & Worldwide Compatibility Weighing only 123g (equivalent to one banana) and featuring a foldable plug. Supports 100-240V, making it usable in both Japan and overseas. Perfect for travel and outings. High Compatibility & Safety Equipped with USB-A ports compatible with over 1000 devices. PSE certified and features multiple protection systems including over-voltage, over-current, over-heat, and short-circuit prevention. Includes temperature management function for safe charging.