This Cable is a splitter that allows you to connect a USB device to your fire stick. Any mini keyboard such as the one in the images can connect with the Fire Stick by plugging the small USB dongle into the cable's USB port and instantly the mini keyboard will work.
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2 Pack Usb Port Terminal Adapter Otg Cable For Fire Tv 3 Or 2nd Gen Fire Stick - AliExpress
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AreMe 4 Pack OTG Cable Adapter for Fire TV Stick 4K, 90 Degree Left and Right
Micro USB 2-in-1 OTG Adapter for Add on any USB peripherals such as keyboards, mouse, flash drives, external hard drives, USB card readers, USB
3 Pack OTG Cable Adapter for Fire TV Stick 4K Max/Cube/Lite,Powered Micro USB to USB OTG Adapter Compatible Android Smartphones,Tablets,Host Devices
2 in 1 Micro Usb (otg Cable Power) Adapter Replacement Fire - Temu
【Expansion Capability】Use this micro USB OTG cable to add keyboard, mouse, U disk, USB flash drive, USB card reader, USB ethernet adapter and other
AreMe 2 Pack OTG Cable Adapter for Fire TV Stick 4K, Powered Micro USB to USB OTG Cable for Android Phone Tablet and More Host Devices with Micro USB
Micro USB 2-in-1 OTG Adapters (2 Pack) Compatible with Fire TV Stick 4K Max Cube Lite, Fires ticks 2nd 3rd Gen, Samsung Galaxy Tablet Tab E Tab 3,
2 Pack OTG Adapter Replacement for Fire TV Stick 4K Max/Cube/Lite, Compatible with Samsung Galaxy Tablet Tab E Tab 3 Powered Micro USB to USB OTG Host
【Expansion Capability】Use this micro USB OTG adapter to add keyboard, mouse, U disk, USB flash drive, USB card reader, USB ethernet adapter and other
AreMe 2 Pack OTG Cable Adapter for Fire TV Stick 4K, 90 Degree Left Angle Powered Micro USB to USB OTG Adapter for Android Phone Tablet and More Host
AreMe 4 Pack OTG Cable Adapter for Fire TV Stick 4K, 90 Degree Left and Right