We are offering fingertip pulse oximeter dual color oled display, four directions adjustable compact and power-economic design high accuracy and durability spo2, pulse rate, spo2 bar graph and pulse waveform display low -power consumption and indication, continuously work for 50 hour small in size, light in weight, and convenient to carry low voltage alarm display, auto power off runs on standard aaa batteries operation menu for the function setting automatic switch-off function for power saving standard configuration: spo2, pr optional configuration: menu function.