Thanks Megaspaz!) Like the left turn this is another hand signal that you should know if you have your license. Unlike the left hand turn this one is a little more tricky to figure out if you aren't familiar with it so don't expect your average car driver to know what this means.
A Single Photon Emission Computed Tomography (SPECT) scan is a type of nuclear imaging test that shows how blood flows to tissues and organs. A SPECT scan integrates two technologies to view your body: computed tomography (CT) and a radioactive material (tracer). The tracer is what allows doctors to see how blood flows to tissues and organs.
Speck is an air quality monitor that detects fine particulate matter in your indoor environment and informs you about changes and trends in particle concentration. In select locations, the Speck will also display the outdoor air quality as reported by the nearest regulated, federal PM2.5 station. Each Speck is individually calibrated and uses machine learning to maximize accuracy, both of which are major improvements on most other devices.