These adapters are very well designed and work great on my new 2018 MacBook Pro 13" After purchase I read that poorly designed Type C products can fry your laptop "USB-C" ports. I contacted the Syntech Team about my concerns and a representative contacted the next day with the following information........Hello,
The 56k ohm resistor is build in and they are designed as USB-IF standards.
Kind regards, Doris
Syntech not only has exceptional high quality products, but also good customer service. I won't hesitate to buy from them for my future needs.