Model 50D
1.Color OLED monitor, 6 different display mode, 10 level brightness.
2.Pulse histogram and 2 kinds Spo2 wave display
3.Easy to use &high accuracy and repetition
4.Small in size, and easy to carry
5.Low voltage alarm display
6.Auto power-off after 8 seconds without signal
7.Light weight of 50g, batteries included
8.Runs on standard AAA batteries and continuous working time is 30 hours
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