The PortaLite Mini developmental fNIRS packages, associated accessories, and software. The PortaLite Mini, based on the PortaLite, uses near infrared spectroscopy to measure absolute tissue oxygen saturation as well as oxy-, deoxy-, and total hemoglobin concentrations. The flexible probe, with a 1.3 meter reach, is even smaller and more convenient to place than before! The PortaLite Mini can be operated using dedicated software, Oxysoft, or configured to take offline measurements to onboard memory. It is useful in a wide range of applications, e.g. brain oxygenation monitoring, sports science, or functional studies. The small size and flexibility of the system make it fantastic stand-alone, or when combined with one of the larger systems!