Pulse Oximeter Oxyo is a Color monitor with 6 display modes, and 4 levels of brightness control available on this device. The SPO2 wave can be displayed in 2 ways according to user`s needs. Automatically power off after 4 seconds when finger out Color OLED monitor, 6 different display modes 4 level brightness. Pulse histogram and 2 kinds Spo2 wave display Easy to use & high accuracy and repetition Small in size, and easy to carry Low voltage alarm display Auto power-off after 4 seconds without signal Light weight of 55g, batteries included Runs on standard AAA batteries and continuous working time is 30 hours