Features Compact design for carrying Fast, reliable SPO2 and pulse rate on patient Bright resolution back light LCD Adjustable alarm limits for SPO2 and PR, as well as visible and audible alarm signals Low power consumption by AA Alkaline batteries or Rechargeable batteries 24 hours data storage The trend view feature allows the operator to display and view previous patient history Rubber jacket providing additional protection and stand Standard Accessory SpO2 reusable sensor for adult SpO2 extension cable 4 AA Alkaline batteries Rubber jacket Operating manual Optional Accessory AC-DC adapter