Simple - Easy two-button operation * Unit beeps when reading appears * Comes with the Adult Articulating Hinged Finger Sensor and 4 Alkaline AA batteries * Alarms - Audible Visible Pulse Rate High/Low SpO2 High/Low Low Perfusion * Compact Size - 7.5 oz. unit * AA rechargeable batteries and AC power with charger stand sold separately * Memory for 72 hours of data storage * 3 Year Manufacturer's Warranty * Efficient - 60 hrs of battery life *