The Arlo Ultra (3rd gen) is a wire-free indoor/outdoor security camera that records 4K HDR video across a wide 180° view, sold here as a two-pack. It requires an Arlo SmartHub or base station (sold separately) and adds colour night vision and a built-in siren. Two wire-free 4K HDR cameras with a 180° field of view Colour night vision and a built-in siren; requires an Arlo hub (sold separately) This description was generated by AI and reviewed for accuracy.