StarTech.com 4-Port Travel USB Wall Charger - 34W/6.8A International Travel Adapter - White - Portable USB Charging Station (USB4PACBK) power adapter - USB - 34 Watt

Charge two tablets and two phones simultaneously, from almost anywhere in the world. This 4-port charger lets you keep all of your mobile devices charged and ready to use, regardless of where you're located. Whether you're at home, in the office or traveling overseas, you can charge up to four devices at once.
The wall charger includes a universal power adapter, which lets you plug into any electrical socket almost anywhere in the world. No matter where you're traveling to, you can rest assured that you can keep your mobile devices charged and ready to use.
Plus, its compact design makes this charger the perfect mobile accessory for storing in your carry-on luggage. The portable USB wall charger features a folding North American plug that tucks away nicely to fit inside your laptop bag or other carrying case. And, you can easily throw in the correct international plug for wherever you're going, so that you're all set to charge your device when you arrive at your destination.
The multi-port charger features Smart IC technology, which enables it to identify what type of device is connected to each port. By recognizing the attached device, the charger delivers the optimal charge specific to each device.
Plus, the charger can deliver 34 watts of power in total, sharing 6.8 amps of power between all four ports. This means you can charge two tablets and two phones at the same time.
The charger supports USB Battery Charging Specification 1.2, which ensures compatibility with a broad range of mobile devices, including the Apple iPhone and iPad, the Microsoft Surface tablet, the Samsung Galaxy Tab, Nexus phones and more.
Keep the charger at your desk and use it as a dedicated charging station for your mobile devices, at home or in the office. Consolidating your USB devices onto a single multi-port USB charger offers a more efficient solution and saves space because you don't need to use multiple wall outlets or power bars.
The USB charging station features built-in safety measures to ensure that all of your devices are protected against damage from overheating, overvoltage, overcurrent or short circuiting. If the 34-watt limit is exceeded, the power being sent to the connected devices will turn off and the charger will reset itself until the load is reduced to safe levels.
Some mobile devices, such as certain Samsung and BlackBerry devices, use proprietary power connections which are not compatible with aftermarket chargers. Please consult the manufacturer's documentation to ensure compatibility with the USB4PACWH.