Expand your security system protection with the advanced Arlo All-in-One Sensor. With eight sensing functions in one compact, go-anywhere design, just place the All-in-One Sensor anywhere you need coverage and easily pick one or more detection functions you want through the Arlo Secure App. Add-on sensor only, requires Arlo Home Security System SS1201, SS1501, or SS1502 (sold separately). | Arlo | | All-in-One Sensor with 8 sensing functions for Home Security System, 1 Pack | White | Best Buy