Can be used as a stand alone pulse meter or attached to a computer via a USB port with the software provided. The brightly-coloured display will show pulse rate and oxygen levels as well as a graph. When used with the software, children can see their pulse rate and how it fluctuates in different situations. Children can also input their name, date of birth, weight and height details and results can be printed. 2 x AAA Batteries required (not included). Contents: Pulse Meter, USB Lead, Software and User Manual.