Etekcity (99% positive feedback from 60,000+) via Amazon offers a 3-pack of its Wireless Remote Control Outlet Switches for $13.98 Prime shipped when promo code BBIO6IY3 is applied during checkout.
Featuring a strong RF signal working through doors and walls without interfering with other electronics, this Etekcity Remote Control Outlet Switch Kit works from as far as 100 feet in line of sight ...