The phrase "simple plug" means something that is easy to plug in or connect. It refers to an uncomplicated and straightforward device or action that requires minimal effort or knowledge. Full definition
If you're not comfortable dealing with electrical wiring, both companies offer simple plug - in modules. (techhive.com)
Even inexperienced remodelers can easily install simple plug - in puck lights under kitchen cabinets, inside built - in hutches, or in bookcases. (bhg.com)
Add simple plug - in puck lights under kitchen cabinets and inside closets. (bhg.com)