Hausbell via Amazon offers its Hausbell WiFi Smart Plug 2-Pack for $34.99. Coupon code "YHM35888" cuts it to $22.74. With free shipping, that's $12 off and the lowest price we could find, although we saw them for $10 less in August. They allow you to set device schedules and control devices remotely via Android. They're also compatible with Amazon Alexa. Deal ends December 31.

Update: The price has dropped to $20.99 after coupon.