TomTop offers this Mini WiFi Smart Plug 2-Pack in White for $18.99 with free shipping. That's a buck under the best price we could find for a similar 2-pack elsewhere, excluding the below mention. Each plug features 802.11n wireless, a timer, voice control via Amazon Alexa or Google Home, and remote control via the Smart Life mobile app.

Note: This item ships from China and requires two to five weeks for delivery. The countdown timer on the product page does not reflect an actual expiration time and resets daily.

A close price: TS_innovations via eBay offers similar plugs for $9.59 $9.45 each with free shipping. (This item also ships from China and requires two to five weeks for delivery.)