GE 15417 is electro-mechanical plug-in timer
GE 15417 GE15119 GE15131 are combined in one instruction sheet:
http://www.jascoproducts.com/support/manual-downloads/applications/DocumentLibraryManager/upload/15119-Manual-eng.pdf1) Rotate dial until current time lines up with stationary black triangle located in center.
2) Segments around outer dial divide 24-hour day into 48 half-hours. Lift segments for times you want lights to be OFF. Segments down for times you want lights ON.
3) Slide-switch on side of timer is manual override. To use timer function, set switch to 'Timer ON'
4) Plug light into timer, plug timer into wall.
5) Maximum load is usually around 500Watts >> check markings on timer for exact load capability.