10 WATTS PER PORT - 3X CHARGE 3 AT ONCE GUARANTEED FOR LIFE ENGINEERED FOR LONG LIFE. Fast charging for up to three tablets or smartphones 3X 10 WATT 3 USB ports, 10 watts (5 V @ 2.1 A) per port. Quality-tested, Guaranteed for Life. Built-in circuits prevent overcharging. Blades fold for travel and storage. Lightweight and compact. Safely charges devices with up to 17 watts to total power. COMPATIBLE WITH Samsung Nokia Kindle Fire HD 8.9, Kindle Fire HDX 8.9, Samsung Galaxy Tab + other devices that charge via USB. FOR WALL OUTLETS: 100 - 240 V AC @ 50 - 60 HZ POWER PROVIDED TO DEVICE: 10 W (5 V @ 2.1 A) PowerBlock 3-PORT USB WALL CHARGER 2017 Griffin Technology. Made in China. 10 RoHS FOR UNIVERSAL. Dual USB-A ports deliver 12W and 5W of power output for smartphones, tablets, and wearables Non-polarized blades fold flat for easy transport and fit most outlets and power strips Compact, space-saving design Griffin ChargeSensor technology delivers the right rate of charging power for your device