TomTop offers the Smart Home 433MHz DC 12-volt 1-Channel Wireless Remote Switch for $5.79 with free shipping. That's $5 under the lowest price we could find for a similar switch. It controls up to 19 devices/bits, including locks, lighting, and more.

Note: This item ships from China and may take four to six weeks to arrive. Also, the countdown timer on the product page does not reflect an actual expiration time and resets daily.