Beurer Pulse Oximeter with Perfusion Index Black is designed for users who want perfusion index alongside spo2 and pulse. A fingertip pulse oximeter measuring SpO2, pulse and perfusion index with a colour OLED display and seven viewing formats. Key verified details include blood oxygen: Measures arterial oxygen saturation (SpO2); pulse: Measures pulse rate; and perfusion index: Displays perfusion index (PI). This keeps the product focused on the functions Beurer specifies for this model. For everyday ownership, display: Colour OLED display; display formats: 7 selectable display formats; and controls: Single-button operation. It also suits at-home fingertip spot checks. Compared with the PO 35, the PO 45 adds perfusion index measurement and expands the display options from four TFT formats to seven OLED formats. That makes it straightforward to assess when these confirmed features are the priority.