Dual color HIGH RESOLUTION easy to read OLED display. Display SpO2, Pulse Rate , and Pulse Bar. 4 display modes for easy reading from all sides. 10 setting adjustable brightness. Small & lightweight design. 2 year limited warranty. Features: Dual color HIGH RESOLUTION easy to read OLED display. Display SpO2, Pulse Rate , and Pulse Bar. 4 display modes for easy reading from all sides. Low power consumption, automatic power off Approximately 30 Hour normal operation. Battery-low indicator. Supports 2 AAA alkaline/rechargeable batteries. 10 setting adjustable brightness. Accommodates widest range of finger sizes from pediatric to adult. Small & lightweight design. 2 year limited warranty. Specifications: SpO2 Measurement range: 70-100% Resolution: 1% Measurement accuracy: 80%-100%; ±2% 70%-79 %; ±3% 0%-69 %; unspecified Pulse Rate Measurement range: 30-235 bpm Resolution: 1bpm Measurement accuracy: 30 - 100; ±2 bpm 101- 235; ±2%