Dual colour OLED displays SpO2, PR, Pulse bar, and waveform Low power consumption: batteries can provide power for up to 30 hours Battery-low indicator Adjustable brightness (10 settings) 6 display modes Automatically power off Operates from 2 AAA alkaline batteries (included) Includes lanyard strap Suitable for paediatric and adult use CE Marked Dimensions: 58mm (L) * 32mm (W) * 34mm (H) Weight: 50g (including batteries) SpO2 Measurement range: 70% - 99% Resolution: 1% Measurement accuracy: 80% - 99%: ±2% 70% - 79%: ±3% ≤69%: No definition