The Reolink Argus Eco Ultra is a 4K battery-powered surveillance camera that works completely wirelessly and impresses with smart motion detection and color night vision. The test shows how good the image quality really is, how reliably the motion detection works and whether the battery delivers what it promises in practice. There is also a look at the storage options with microSD card, Home Hub and Home Hub Pro as well as integration into smart home systems such as Alexa, Google Assistant and Home Assistant.