Must be used with S-Click 2-wire and S-Click 3-wire timer mech's HNS410TM, HNS420TM, HNS440TM or HNS450TM Senses movement and light to trigger S-Click timer mech's Fits in standard HPM and Clipsal face plates with lenses Designed, engineered and manufactured in Australia Must be used with S-Click 2-wire and S-Click 3-wire timer mech's HNS410TM, HNS420TM, HNS440TM or HNS450TM Senses movement and light to trigger S-Click timer mech's Fits in standard HPM and Clipsal face plates with lenses Designed, engineered and manufactured in Australia