The short answer
- Every baby monitor takes one of two paths. A WiFi monitor sends video through your router and the internet to an app on your phone. A direct-connection monitor sends it straight from the camera to a parent unit in your home, with no internet in between.
- FHSS, DECT and Bluetooth aren’t separate kinds of monitor. They’re ways a radio shares the airwaves, and you’ll find them inside many different devices.
- The path matters more than the acronym. A direct connection keeps working when the internet goes down and keeps no cloud copy of your video. WiFi adds the ability to check in from anywhere.
| Term | What it is | Internet in the path? | Where you watch or listen | Where you’ll usually see it |
|---|---|---|---|---|
| WiFi | The camera joins your home network and reaches an app through the manufacturer’s servers | Yes | Your phone, from anywhere with internet | App-based video monitors and smart cameras |
| Direct connection | The camera is paired to its own parent unit and talks only to it | No | A dedicated parent screen, within range of the camera | Video monitors with a handheld parent unit |
| FHSS | A radio technique that hops between channels to share busy airwaves | Not on its own. It describes how a radio transmits, not where the signal goes | Depends on the device | Many direct-connection monitors, cordless devices, and Bluetooth |
| DECT | A digital standard borrowed from cordless home phones | No | A parent unit, usually audio only | Audio baby monitors |
| Bluetooth | A short-range, low-power link between two nearby devices | Not on its own, though a phone or hub may send the data on | A phone or base station close by | Wearable sensors, usually not the main video link |
| Analog | An older, simple radio signal | No | A parent unit | Older and very basic audio monitors |
| Hybrid | A parent unit plus an optional WiFi app | Only when the app is in use | Either the parent unit or your phone | Monitors that offer both |
Start with the path, not the acronym
Monitor boxes are full of terms like 2.4 GHz, FHSS, DECT and WiFi. They sound like they’re describing the same thing. They aren’t.
Some describe the path the video takes: through the internet, or straight to a screen in your house. Others describe the radio technique a device uses to send its signal through the air. For privacy and reliability, the path is what decides most of the outcome. So that’s where to start.
How does a WiFi baby monitor work?
A WiFi monitor connects to your home network the same way your phone or laptop does. The camera sends video through your router to the manufacturer’s servers, and from there to an app on your phone.
The path looks like this: camera → router → internet → company servers → app.
That path is what makes WiFi monitors convenient. You can check in from work, share access with a partner or grandparent, save clips and get notifications on your phone. Plenty of families use them happily every day.
The tradeoff is that your video passes through systems run by several parties, so its privacy depends on all of them being well maintained. That means strong passwords, current firmware and a manufacturer that looks after its servers. Most reported problems with WiFi cameras have come down to weak or default passwords and outdated software, not to WiFi itself.
How does a direct-connection monitor work?
A direct-connection monitor pairs the camera with its own parent unit. The camera talks to that screen and nothing else. It doesn’t join your WiFi network, doesn’t reach the internet and doesn’t send anything to a company’s servers.
The path is short: camera → parent unit. That’s the whole thing.
Most of these monitors use the 2.4 GHz radio band, the same band many household devices share. Because there’s no internet in the path, there’s no account to create, no password to manage and no cloud copy of your baby’s video. The limit is range. You can watch anywhere the signal reaches inside your home, but not from across town.
What is FHSS?
FHSS stands for frequency-hopping spread spectrum. Instead of transmitting on one fixed channel, a radio using FHSS hops quickly between many channels in a pattern its paired device follows along with.
The idea is older than you might expect. In 1942, actress Hedy Lamarr and composer George Antheil patented an early version of frequency hopping. Today the same basic idea shows up in Bluetooth, cordless devices and many direct-connection baby monitors.
Its main job is to share busy airwaves well. The 2.4 GHz band is crowded with WiFi routers, microwaves and other gadgets. Hopping between channels helps a link avoid getting stuck on a noisy one, which can make the connection steadier.
One thing to know: hopping is about how a signal moves through the air, not where it ends up. FHSS on its own doesn’t tell you whether a monitor is online, and it isn’t the same as encryption. If a box lists FHSS, it’s still worth asking where the video goes.
What is DECT?
DECT is a digital standard originally built for cordless home phones. It’s common in audio baby monitors. In the US, DECT devices use the 1.9 GHz band, which sits apart from the 2.4 GHz band that WiFi routers share. Fewer neighbors on that band can mean less interference.
Like other direct links, a DECT monitor talks between its own two units without going online.
Where does Bluetooth fit?
Bluetooth is a short-range, low-power link between two devices close to each other. It hops between channels too. In baby products, you’ll most often see it connecting a wearable sensor to a base station or a phone. From there, the data may stay local or travel on to the internet, depending on the product.
What about analog monitors?
Older monitors sent a simple analog radio signal from the nursery to the parent unit. Many weren’t scrambled at all, so a nearby receiver on the same frequency could sometimes pick them up. Digital connections have largely replaced them.
And hybrid monitors?
Some monitors come with a dedicated parent unit and an optional WiFi app. When you use the parent unit, the video takes the direct path. When you turn on the app, it takes the WiFi path. If you’re weighing one, it helps to know which features need the app.
What happens when the internet goes down?
A WiFi monitor depends on that connection. If your service drops, your router restarts or the manufacturer’s servers have an outage, the app usually loses the live feed until things come back. Some models keep a local view going on the same network, but that varies by product.
A direct-connection monitor doesn’t notice. It never used the internet, so the camera and parent unit keep talking as before. The same is true if the company behind the product ever stops running its servers.
Which connection is right for your family?
Both work. They’re built for different priorities.
WiFi suits families who want to check in from anywhere, share access easily or save clips. The tradeoff is an account, an app and a longer path for the video to travel.
A direct connection suits families who want the video to stay in the house and a setup with nothing to log into. The tradeoff is that you watch on the parent unit, within range of the camera.
For most nights, you’re in the next room or down the hall, and either approach covers that. The difference shows up at the edges: checking in from away (WiFi) versus keeping the nursery off the internet entirely (direct).
Questions to ask before you buy any monitor
Where does the video go after the camera captures it? Straight to a parent unit, or through a network and company servers?
Is an account or app required, or optional? Some monitors need one to work at all. Others offer it as an extra.
What happens if my internet goes down? Does the feed keep running?
If video is stored, who can access it and for how long? Check the manufacturer’s data policy.
How far does the signal reach in my home? Thick walls and large appliances can shorten the range of any wireless link.
These aren’t gotcha questions. They’re the same ones you’d ask about any device with a camera pointed at your baby’s crib.
What SightAware does and doesn’t do
SightAware’s camera connects directly to its own parent screen. Nothing passes through your home WiFi, the internet or the cloud. Video, sound and skin temperature readings go from the nursery to your parent screen and stop there.
SightAware doesn’t offer remote viewing through a phone app, cloud video storage or smart home integration. We left those out on purpose in this version, not because they lack value, but because we chose to keep the nursery off the internet first.
SightAware is a wellness device, not a medical device, and is not intended to diagnose, treat, cure, or prevent any disease or condition. Skin temperature readings are for informational purposes only to help parents monitor general wellness and comfort. For any health concerns, always consult a pediatrician or qualified healthcare provider.
When to call your pediatrician
If your baby is showing signs of distress, seems unusually sleepy or hard to wake, is having trouble breathing, or something just doesn’t feel right to you, trust your instincts and call your pediatrician. No monitor, however it connects, replaces a parent’s judgment or a doctor’s care.
Nothing to log into. Nothing in the cloud.
SightAware’s camera connects directly to its own 5-inch parent screen, with contactless skin temperature sensing built in. No WiFi, no app, no subscription.
See SightAware