From the makers of the revolutionary heated grip controllers the 2 zone and 4 zones, Symtec has designed a single button digital controller to control the temperature of your heated vest or any other device you would like to control. With just a simple press of one button, you can turn on the device, then by simply pressing the same button you can adjust what temperature you would like your vest to heat at. There are four different levels. This will work with almost any vest made, just simply plug this in to your existing unit. If it will not plug in, no problem, Symtec offers many adapters and connectors to install the Heatcontrol on almost any vehicle. As a bonus it also has a USB port, so you can charge you phone or MP3 player as you ride.