WD Tech is a Polish startup, which implements technologically advanced solutions for daily health care. FLOW headband is our product. It is a multifunctional device for measuring parameters from sweat: glucose, lactate, sodium and potassium ions and skin temperature. The developed band will be dedicated to people who lead a physically active lifestyle, athletes, but also people suffering from civilization diseases, especially diabetes and kidney disease, and being in the process of rehabilitation. The band will allow users to monitor and evaluate their physiological condition in real time.