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The camera itself contains a battery, and is totally wireless when not charging. It's battery can be charged when placed on the wired charging ring.
The Logi Circle is small, and can be taken virtually anywhere. It weighs just 9.6oz, and measures 2.5x3x2.5" (6.5x7.6x6.5cm).
Pro Speak and listen capable
There is a microphone and speaker built into the camera, allowing for a conversation between yourself and anybody on the other side of the camera.
Con Disappointing battery life
While it's convenient that it can be taken away from the charger, it would be even more convenient if the battery lasted longer than 2 hours. There is a power save feature which can extend the battery to last around 10 hours, but this cripples the resolution.
Con Low resolution camera
While 720p is sufficient for most media, a security camera benefits significantly from a higher resolution. More resolution allows for more digital zooming - in the case of an intruder, you can see exactly what they are doing.
Con No local storage
All videos recorded go straight to the cloud, as there is no local storage on the Logi Circle.
Con Poor app design
The app only works in landscape, and you have to use the app (there is no browser support).