Eufy Security E340 Doorbell: Dual-Lens Camera System

The Eufy Video Doorbell E340 keeps your front door safe. It has two cameras. It records in 2K. There's no monthly fee. You own your footage. It stays on the device.

Two Cameras, Better Coverage

Most doorbells have one camera. This one has two. The top camera watches faces. The bottom one watches packages. You can see the full view of your porch. It's clear day and night. You won't miss a thing.

The video is 2K sharp from the main camera (2048 x 1536) with a 160-degree view. The downward camera is a 1600 x 1200 unit, so call it 1080p-class rather than a second 2K sensor. You can see faces clearly. You can read package labels. The 8 GB built-in storage holds about three months of clips by eufy's estimate of 30 twenty-second events a day. No cloud fees. No one else sees your footage. It's all yours.

Pick Your Power Source

You can wire it in or use a battery. Both work well.

• Battery mode: The removable battery pack runs up to 6 months on a charge by eufy's figure and refills in about 5 hours. Setup takes about 15 minutes. No wiring needed. It's great for renters.
• Wired mode: Plug into your old 16-24 V AC doorbell wires (eufy's spec sheet says 10 VA, its EU store says 30 VA or more, so a weak old transformer may need swapping). It runs 24/7. The battery still has to be installed even when wired.

It works with most home doorbell wires. Your old chime still rings. You can also ask Alexa to tell you when someone's at the door. Say "Alexa, show me the front door." Your Echo screen shows the live view. Google Assistant can pull up the stream too, though eufy's table says it won't announce a doorbell press the way Echo devices do.

Smart Person Detection

The camera has a smart chip built in. It spots people. It skips cars, leaves, and dogs. You only get alerts that matter. It also spots package drops. You'll know when your box arrives. You'll know if it gets taken.

The app is simple to use. Setup takes under 10 minutes. You don't need tech skills.

Built for All Weather

The E340 has an IP65 weather rating. That means rain and snow won't stop it. It works from -20C to 50C. Hot summers and cold winters are no problem. It keeps watching all year long.

Settings You Can Change

You have full control over what it detects.

Motion zones: Draw a box on the screen. The camera only watches that area. This way street traffic won't set off alerts.

Alert level: Set it to Low, Medium, or High. Match it to your street.

Video settings: Change the frame rate and video quality. Save more space or get sharper clips.

Two-way talk: Talk to guests through the app. Use a speaker to send your voice outside.

Wi-Fi: It works on 2.4 GHz Wi-Fi. It does not work on 5 GHz only networks.

Video Storage Options

There is no microSD slot on the doorbell itself. Clips live on the 8 GB eMMC chip inside it, and if you want more room you pair it with a HomeBase 3 (S380), which takes a hard drive or SSD of up to 16 TB. The HomeBase needs firmware V3.3.2.6 or later to see the E340; eufy's UK page now says V3.7.2.8, so update the hub first. No fees. No cloud. Just your hardware.

eufy's spec sheet for this doorbell lists on-device and HomeBase storage only, with no cloud tier for it, so plan on the local route. And no, it does not do Apple HomeKit: eufy's own compatibility table marks HomeKit as unsupported for the E340, with Alexa and Google Assistant as the two voice platforms.

All stored video uses AES-256 coding. Your footage is locked tight. Only you can see it.

How to Set It Up

Battery setup (15-20 minutes): Mount it on the wall. Put in the battery. Connect to Wi-Fi. Done. No wires needed.

Wired setup (20-30 minutes): Hook it to your old doorbell wires. It runs all the time. No need to charge.

Hybrid mode: Use the Eufy power adapter. It keeps the battery full while mounted. Best of both.

Who It's Best For

It's great for renters. No wiring needed. Just mount and connect. It's great for people who care about privacy. Your footage never leaves your home. It's great for homes that get a lot of packages. The two-camera view catches all of it.

It also has a loud alarm and bright LED lights. If something looks wrong, the alarm can go off. That alone can scare off an intruder.

Cost Over 5 Years

Eufy E340:

• Buy it: $150-170 list (eufy's US store showed $169.99 in October 2026, its own comparison table $149.99; sales have dipped to $90-120 at Costco and Amazon)
• New battery in year 3: $30-50
• Monthly fees: $0
• Total: About $36-46 per year

Ring Video Doorbell Pro:

• Buy it: $200
• Cloud storage (5 years): $600
• Total: About $160 per year

Google Nest Doorbell:

• Buy it: $200
• Cloud fee: $0 (short clips only)
• Total: About $40 per year

The E340 saves you money. No fees, month after month.

E340 vs. Other Doorbells

Ring has a smooth app. It's easy to use. But you pay each month. Over five years, that's $600 extra.

Google Nest works well if you use Google Home. But the free clips are short. You can miss key moments.

The E340 doesn't need a monthly plan. Your footage stays local. You get two cameras. Ring and Google only offer one. For most homes, the E340 is the smarter pick.

Our Take

The Eufy Video Doorbell E340 gives you a lot for the price. You get two cameras. You get 2K video. You get smart alerts. You get local storage. There's no monthly fee. It works with Alexa and Google Assistant, not HomeKit. Setup is fast and simple.

It's a solid choice for any home. It saves you money over time. It keeps your footage private. It's tough enough for any weather. If you want a doorbell that does more and costs less, the E340 is a great fit. Prefer a wire-free model? The Eufy Security C31 uses a 2K sensor with a 160-degree view.

The E340 is built for real home security. The dual-camera design gives you more protection than a single-lens doorbell. You see faces and packages at the same time. That's a big deal when you're away. You get clear video, smart alerts, and local storage. All with no monthly fee. It's a smart pick for people who want full coverage without ongoing costs.

A lot of doorbells make you pay to see your own footage. Not this one. Your clips stay on your device. No one else can see them. You don't need to trust a cloud service. That's a big plus for anyone who cares about privacy. The E340 keeps your home and your data safe at the same time. That's why it is notable from the crowd.

It also pairs well with smart home routines. When someone rings the bell, your lights can turn on. Your phone gets an alert. You can talk to the person at the door from anywhere. You can let them in with a smart lock such as the eufy Smart Lock C220 or just wave them off. It all works fast and is easy to set up.

The dual-lens configuration provides both wide-angle and detailed views. This system integrates multiple sensors for comprehensive coverage.