Boost your home's security range with the Blink Sync module XR system hub. It extends the range of Blink Outdoor 4 cameras, giving you greater reach across your property. You can place cameras up to 76.2m (250ft.) away or up to 121.9m (400ft.) away in XR+ mode for broader coverage. Blink app allows you to control up to 10 devices, making it easy to arm, disarm, and manage all in one place | Blink Sync Module XR Range Extender/System Hub for Blink Outdoor 4 Camera (BSM00500U)