Yes, you just need to plug these in; But beware! In our house, they were a clarion call to ants

A coincidence? About 1 week after plugging these devices into outlets throughout our house, we experience a home-wide ant invasion. Little black ants emerged from under/over baseboards, faucets and faucet handles, and even a light-switch plate. In the end, we had to call in an exterminator. Did this product do any good in our home? No way scientifically to measure that. Did this product cause our ant invasion? No way scientifically to prove that. But we wish we had not plugged these devices into outlets in our home.

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