Photocell, 15A, 120V, 1800W, 1000 VA, Stem & Swivel Mounting.
Intermatic INTK4221C photocontrols install on standard outdoor light fixtures and electrical boxes with 1/2"- 14 NPSM thread or 7/8" punch-out holes for dusk-to-dawn ON/OFF control of outdoor lighting.
Also known as: 078275002029, K4221C, IMTK4221C, parascope, goose neck photocell, Knuckle photo cell, photo eye