Zwave Products via Amazon offers Prime members the Schlage Home Dimmer Module, model no. RP200RNX, for $19.99 with free shipping. (Non-members can qualify for free shipping with orders of $35 or more; otherwise, shipping costs $7.32.) That's tied with our mention from a month ago and the lowest total price we could find by $29. This dimmer allows you to control your lights via your smartphone.