You'll pay a premium for the Arlo Ultra, but you get a lot for your money. This is the first security camera we've tested that streams and records 4K video, and there are no wires to deal with, making installation a snap.

No wires; Weatherproof; Detailed 4K imagery with a wide field of view; Color night vision; AI-based motion detection; Integrated spotlight; Auto-zoom and motion tracking; Amazon Alexa, Apple Watch, and Google Assistant support

Expensive; Requires a hub; Some features require a subscription

The Arlo range of security cameras has been a big success for Netgear in recent years -- so much so that the company decided to spin-off the Arlo division and float the new Arlo Technologies Inc. on the stock exchange last summer.

High-quality 4K video camera; with HDR; 180-degree panoramic video; with 12x digital zoom; Integrated spotlight and siren; Colour night-vision

Expensive; Requires subscription after 12 months; 4K online storage costs extra

4K in home security is finally here, thanks to Arlo's Ultra UHD smart cam

Beautifully crafted hardware design; Weatherproof and wireless for indoor/outdoor use; Fabulous 180-degree field of vision with little fish-eye distortion; Decent two-way audio; 4K UHD image clarity

Some features unavailable when using 4K video settings; No ability to view locally stored video without removing the microSD card; Double-tiered subscription required for 4K cloud recording

You've got numerous choices in connected some security cameras these days, but almost all of them require wires. Running a camera solely on batteries introduces a lot of uncertainty. Will it last long enough Will it wake up reliably

Video The 4K video is a huge step up from past Arlo cameras; It looks great and file sizes aren't enormous, Battery The battery will last a month or more on a charge, and it's more reliable than other battery-powered cameras, Local storage You can save all your recorded videos to a microSD card...

Price The $400 price tag for the single-camera kit is a bit outrageous when there are so many cheaper wired cameras; Speed While it's better than other wireless cameras; the Arlo Ultra still takes a few seconds to wake up; Local video restriction For some reason; you can only stream in 4K while on...

If you fancy connecting everything at home to an app, you can now add a high-resolution surveillance camera to the list of changeable lights and other smart home items hooked up to the Net.

I bought the five camera system, but can only get four of the cameras to work. I have contacted Arlo/Netgear via the web based tech support, but the response has been painfully slow and the suggestions unhelpful. The cameras that are set up are working fine.

The Arlo Ultra represents some of the best outdoor security video that you'll find. The combination of 4K and HDR, good night vision and control over motion detection and the notifications you can receive all goes some way to justifying the lofty price.

Video quality is superb with 4K HDR; Lots of features; Easy mounting and installation; Works with wider Arlo system

High price; Needs subscriptions; Caveats on features; Mounting not secure; 4K live stream is hit and miss

The Nest Cam IQ Indoor was the first security camera that I tested to have a 4K sensor, although this model downsampled all footage to 1080p. That makes the Arlo Ultra the first camera I've reviewed to be able to save 4K footage, delivering some of the most impressive and detailed images that I've...

Easy to install; Excellent 4K footage; Powerful modes gives you complete control over recording

No 4K recording out of the box; 4K streaming disables motion tracking

The Arlo Ultra is by far the best smart security camera I've used: tThe footage is sharp, the features are top notch and Arlo's subscription package is both generous to those who don't want to pay and flexible enough to include those who do.

Crystal-clear; wide-angle 4K footage; Generous free cloud storage; Records in colour at night

Higher subscription price for 4K; Expensive camera; Most people can't view 4K footage easily

The Arlo Ultra has its limitations, but if you're willing to spend the money you'll love the good image quality and smorgasbord of smart features.

Excellent image quality; Packed with features; Well-designed app

Expensive; Some features limit resolution