First previewed back in August of last year, San Francisco company Hello follows up their very successful Kickstarter campaign with worldwide availability of their talked-about Sense Sleep Tracker.

Designed to blend perfectly into any contemporary home, the device looks like a futuristic bird's nest and comes in either "cotton" or "charcoal." The size of a tennis ball and powered by microUSB, Sense monitors ambient light, sound, temperature, humidity and your movement. The movement tracking aspect is achieved through the Sleep Pill, which is a quarter-sized clip that attaches to your pillowcase to follow your movement during the night.

Both the Sense itself and the Sleep Pill communicate with one another via Bluetooth 4.0, while the two also interact directly with your smartphone. Every morning you'll see the previous night's sleep score, data from the various sensors inside Sense, your average sleep score and duration over the past week, alongsisde statistics on your sleep.

A sleep score, by the way, is a measurement out of 100 that uses a bunch of different variables to determine your quality of sleep the night before. Using Sense, the overall goal is to achieve a higher sleep score by doing things like reducing light, sound, and keeping your room cool.

Perhaps the best part of all is that once you're set up, you don't have to do a thing more besides check in on your sleeping habits as you feel like it. Sense learns all it needs to know just by you being there, resulting in a product that integrates seamlessly with your environment.

Order the Sense Sleeping Tracker by tomorrow, December 18, to receive yours in time for Christmas.