For Watchdog 220 MasterLINE. For Watchdog 220 MasterLINE select. For Watchdog 220 MasterLINE premium. For Watchdog 280 MasterLINE. For Watchdog 220 MasterLINE KNX. For Watchdog 220 MasterLINE KNX premium. For detection on two sides of the house, in combination with Watchdog 280. For ceiling mounting of the Watchdog. To increase the inclination of the Watchdog 220/280. It is mounted at the corner of the house, on the wall or under the ceiling. For flush or surface wiring.