Innovo Classic Series Finger Tip Pulse Oximeter with Audio Alarm and Integrated with Pulse Rate, Spo2 Probe and Processing Display Module (Blue)Product adopts double colors OLED display, can show the six different display mode. Low power consumption, continuously work for more than six hours with AAA batteries. Low voltage indiacator. In the absence of signals, the product will be in after 8 second to enter standby state. Small in volume, light in weight and convenient to carry