Amazon Fire TV Stick is a well-known streaming media device, because of its complete configuration, good price, and Google certification, it is very popular with customers. However, the Amazon TV Stick does not have a USB port, so many functions are limited, you cannot directly use a USB flash drive, 2.4G wireless remote control and other devices that need to connect by USB host.
When you bought this micro to USB OTG cable adapter, you can use the USB drive directly like the below videos. This adapter is not for Amazon TV Stick only, also can work on other TV Stick that does not have a USB host.
At the same time, the Firestick with this 2-in-1 cable adapter, we can also use a lot of other devices, such as the Sync Backlight. With this TV sync light, you can have a good experience while watching movies or sports show on your TV stick 4k. You can get more info from the following video.