KVO function: When finish the total volume of an infusion, the pump will alarm and enter KVO state. HD LED Display, Friendly User interface for Nurses. Large Infusion Speed Range with a Maximum of 1200ml/h. The pump includes a set of Rechargeable Lithium batteries that provides Auto Power Failover. Operates at Car DC 12V that is not limited to 220V AC. Equipped with Nurse Paging Connecting Port. Features:- Compatible with all types of Tubes Voice Alarm Function automatically opens up when there are blockage, bubbles, Infusion is finished etc. In-Time and Accurate Voice Alarm which reduces Nurse workload. Automatic calibration for IV sets of any Brand and Switch between ml/h and drops/min freely.