What a Firestick does and how it gets power
A Firestick is a small device that plugs into the HDMI port on the back of your TV and turns it into a streaming player. It connects to your home Wi-Fi network, then pulls video from the internet and sends it to your television. The device itself is about the size of a USB thumb drive — roughly 3.5 inches long and less than an inch thick.
Power comes from a USB cable that plugs into the Firestick's power port. Amazon includes a power adapter in the box; you plug the adapter into a wall outlet, and the cable runs to the Firestick. Some newer TV models have a USB port on the back that can power the Firestick directly, which eliminates the need for a separate power outlet nearby.
Once plugged in and connected to Wi-Fi, the Firestick downloads apps — software programs that let you watch specific services. Netflix, Prime Video, Disney+, Hulu, and hundreds of others are available through the Amazon Appstore. You install the apps you want, then use the included remote to open them and play content.
Key Takeaways
- A Firestick plugs into your TV's HDMI port and connects to your home Wi-Fi to stream video from the internet.
- The device needs power from a USB cable connected to a wall outlet or, on some TVs, a USB port built into the television itself.
- You read apps for each streaming service you want to use, then use the remote to navigate and play shows or movies.
- The Firestick stores apps and your viewing history on its internal storage, but the actual video files stay on Amazon's servers or the service provider's servers.
- Buffering happens when your internet speed is too slow to read video fast enough, causing the Firestick to pause and load more data.
How the remote talks to the Firestick
The Firestick comes with a remote that uses infrared (IR) or Bluetooth to send commands to the device. Older Firestick models use infrared, which requires a direct line of sight — you point the remote at the Firestick like you would a traditional TV remote. Newer models use Bluetooth, which works through walls and around corners because it doesn't need a direct line of sight.
When you press a button on the remote, it sends a signal to the Firestick telling it what to do: play, pause, go back, open an app, or type text. The Firestick receives the signal and performs the action. If you have a newer Firestick with an Alexa voice remote, you can also press the microphone button and speak commands like "play The Office" or "go to Netflix," and the Firestick will understand and act on what you say.
Where video actually comes from
When you open Netflix on your Firestick and select a show, the Firestick sends a request over your home Wi-Fi to Netflix's servers on the internet. Netflix's servers send back the video file in small pieces called packets. Your Firestick receives these packets, reassembles them into video, and displays it on your TV.
The video file itself never lives on your Firestick — it streams directly from Netflix's servers to your TV in real time. This is why you need an internet connection to watch anything. The Firestick does store a small amount of temporary data (called a cache) to smooth out playback if your internet connection briefly stutters, but the actual show or movie stays on Netflix's servers.
Different services work the same way. Prime Video streams from Amazon's servers, Disney+ from Disney's servers, and so on. The Firestick is just the middleman that receives the video and displays it on your TV.
Internet speed and buffering
Buffering is what happens when your Firestick can't read video fast enough to keep up with playback. If your internet connection is slow, the Firestick pauses the video and loads more data into its temporary storage. Once it has enough data loaded, playback resumes. This pause is the buffering you see on screen.
Amazon recommends at least 1.5 megabits per second (Mbps) for standard definition video, 5 Mbps for HD (1080p), and 15 Mbps for 4K. These are minimum speeds. If you have multiple devices on your Wi-Fi at the same time — a phone, a laptop, another Firestick — they all share your internet bandwidth, which can slow down the Firestick and cause buffering.
If you experience frequent buffering, the problem is usually your internet speed or Wi-Fi signal strength, not the Firestick itself. Moving the Firestick closer to your router, removing obstacles between them, or upgrading your internet plan can help.
Storage and apps on your Firestick
Your Firestick has built-in storage — typically 8 GB or 16 GB depending on the model — that holds the apps you install and your viewing history. When you read Netflix, Prime Video, or any other app, it takes up space on this storage. Your watch history, saved passwords, and preferences are also stored on the device.
If you run out of storage, you can uninstall apps you don't use. The video content itself — the shows and movies you watch — is not stored on the Firestick; it streams from the service provider's servers. This is why you can have thousands of titles available to watch without needing a huge device.
If you sign out of your Firestick or factory reset it, your apps and watch history are erased from the device. However, your account information stays with the service (Netflix remembers your watch history in your Netflix account, for example), so you can sign back in and pick up where you left off.
How Alexa integration works on newer models
Firesticks with Alexa voice remotes have a microphone built into the remote itself. When you press the microphone button and speak, the remote sends your voice to Amazon's Alexa servers over your Wi-Fi. Alexa processes what you said and sends back a command to the Firestick telling it what to do.
This is why voice commands require an internet connection — your voice has to travel to Amazon's servers to be understood. The Firestick can't process voice commands on its own; it relies on Alexa's cloud-based processing. If your internet goes down, voice commands won't work, but you can still use the remote's buttons to navigate.
Voice commands on a Firestick can open apps, search for shows, play music, control smart home devices, or answer questions. The microphone only listens when you press the button, not continuously, so it's not recording everything you say.
Connecting multiple devices and casting
Some Firestick models support casting, which lets you send video from your phone or computer to the Firestick. If you have a photo on your phone you want to see on the big TV, you can use the casting feature to send it to the Firestick, and it will display on your television.
You can also use Firestick as a hub for other Amazon devices. If you have Alexa speakers or smart home devices in other rooms, the Firestick can communicate with them over your Wi-Fi network. This lets you control lights, thermostats, or other smart devices from your Firestick remote or by voice command.
Multiple Firesticks can be connected to the same Wi-Fi network and the same Amazon account. Each one works independently, but they can share apps and settings if you set them up that way.
Frequently Asked Questions
Do I need a cable or satellite subscription to use a Firestick?
No. A Firestick works with any TV and only needs an internet connection. You don't need cable, satellite, or any traditional TV service. You do need subscriptions to the streaming services you want to watch (Netflix, Disney+, etc.), but those are separate from the Firestick itself.
What happens if my Wi-Fi cuts out while I'm watching something?
The video will pause and you'll see a buffering message. The Firestick can't read more video without an internet connection. Once your Wi-Fi comes back, the Firestick will resume playback. If the connection is down for a long time, you may need to restart the app or the Firestick.
Can I use a Firestick on a TV without an HDMI port?
No. The Firestick requires an HDMI port to connect to your TV. Older TVs without HDMI ports cannot use a Firestick. You would need a different device or a TV with HDMI capability.
Does the Firestick work if I'm not connected to Wi-Fi?
No. The Firestick needs an active internet connection to stream video. It cannot read or play content over cellular data or without Wi-Fi. If you want to watch offline, you would need to read content to a phone or tablet using an app that supports offline viewing, like Prime Video or Netflix.
How much does it cost to run a Firestick?
The Firestick itself uses very little electricity — roughly the same as a light bulb. Your electricity cost depends on your local rates, but it's typically less than a dollar per month. The main cost is your internet service and any streaming subscriptions you choose to pay for.