The USB power cable for the Fire TV Stick can be directly powered from the TV's USB port, eliminating the need to use an AC adapter. Replacing the Fire Stick's USB cable will keep your installation clean and tidy | Compatible with all streaming devices that support micro USB ports, it works with all Fire Stick models (including the new 4K/Max version), Roku/Chromecast/TV Sticks, and other streaming sticks. | Easy to install, plug and play, no driver required. Just plug the micro USB into the Fire Stick and then connect the USB A to the TV's USB port. This perfectly solves the problem of some TVs failing to start or repeatedly restarting due to insufficient power supply | The integrated 5V power conversion module incorporates multiple protection circuits, ensuring the stable operation of the streaming media stick by delivering a consistent voltage and current output through the TV's USB port. It is capable of providing a maximum output of 5V/2.1A, which is sufficient to support an immersive experience with 4K movies. | Please charge the device for ten minutes before using it for the first time. Note that it only powers the fire stick when the TV is on, and will automatically stop supplying power when you turn off the TV to save energy and promote sustainability. If you have any questions, please don't hesitate to contact us - we guarantee a satisfactory response within 24 hours.