MQ3500 Pediatric Pulse Oximeter has an easy to read OLED display due to its Dual Color High Resolution. It has a SpO2 display with a pulse bar, Pulse Rate and Plethysmogram. It has 6 display modes for easy reading from all sides. The power consumption is low and it has a low battery indicator and it has an auto off function. The normal operating hours are approximately 30 minutes. It is so small and light weight that it can fit in your pockets and can carry along with you wherever you go. This product comes up with a carrying case with 2 AAA batteries along with a 2 year warranty.