Unboxing the T855i Pro1 thermostat gives us a look into what all is included and reveals to us the requirement to have it hard-wired into a power source. Let's take a look. Video Script: Here's what comes in the box when you purchase the Pro1 T855i Wi-Fi Thermostat. First, you'll see the homeowner quick start guide, the installation manual, and the operation manual. It also comes with two screws and anchors for you to mount the thermostat on your wall. It's important to note there is no place to put batteries, so the thermostat must be hard wired in order to operate.