Resolution: No amount of security video will help you if it’s blurry, jittery, or otherwise distorted. Look for a camera that offers the highest possible resolution. Most currently offer 720p (often referred to as "high definition" or HD), but some newer cameras are coming out with 1080p (often referred to as "full HD"). Keep in mind higher-res cameras use more Internet and Wi-Fi bandwidth and battery life. Many cameras also offer a software zoom feature (which is not the same thing as having a physical zoom lens).
Scheduling: Scheduling features allow you to tell the camera to turn on and off, detect motion, and/or send alerts at specified times. This is useful when you, say, only want to be notified when your kids get home from school or just want to monitor your home when you’re away. It also reduces the amount of false alerts.
Security: There have been plenty of headlines about hackers compromising home cameras, baby monitors, and other Wi-Fi devices to spy on people, so be sure to check what steps has each manufacturer taken to eliminate this problem. Look for a camera that supports up-to-date wireless security protocols, such as WPA2, and make sure it encrypts Internet transmission of your your user name, your password, and the live feeds. Never install a security camera (or a router or any other device on your home network) without changing its default user ID and password.
Two-way audio: While the idea of a security camera implies eyes-on monitoring, the ability to also hear what’s going on gives you a more complete picture of what’s happening on the home front when you’re away. It can also alert you to something occurring out of the camera’s field of vision. This feature can also allow you to speak through the camera, a great tool for remotely commanding an unruly pet or startling an intruder in the act, but be aware that you might need to plug in a powered speaker for this feature to work.
Viewing angle: The camera’s field of view determines how much it can see. As you’re probably monitoring a single room, you want a wideviewing angle. Most current cameras fall in the 130-degree range. These wide angles can sometimes cause image distortion at the edges in the form of a fisheye effect, particularly when used in smaller rooms, but it's not like you're going to use a security to capture snapshots for your photo album.
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