You can safely charge two devices simultaneously with the dual USB output.
Now your device's charge would never ends while you're in travel.
Short circuit protection
Apple Inc.'s MFi Program is the name given to its licensing program for developers of hardware and software peripherals. With this license of production, the manufacturer legally obtains the right to manufacture and use the Lightning cable, Powerbank and various Apple connectors developed for all Apple products, in their own applications.
The manufacturers who paticipated in the MFi program and pass the certification tests only are legally able to display certain MFi-related logos such as "Made for iPhone/iPod/iPad" on their product packaging. The products which don’t carry the original MFi logo are not originally approved by Apple and the use of these products may cause harm to your iDevices.
Tuncmatik posseses the MFi program certification and allows you to use all your Apple products safely with it’s wide range of products.