Dealing with summer heat is extra awful when trying to get a good night's sleep. Rather than suffering through the warmer months, use a few appliances to keep your bedroom at a cool, comfortable temperature. This includes utilizing a dehumidifier, which will not alternate room temperature but will remove humidity.
A dongle is a small piece of hardware that connects to another device to provide it with additional functionality.
The Fitbit dongle is a miniscule USB stick that, once connected to a laptop, blends right in. You'll forget it's there. But anytime your Force is within range of that dongle, the data uploads and syncs.