Features for FA3 Series: Can display and preset the speed rate and volume Can display the infused volume Speed rate unit: ml/h With Bolus rate(Purge rate) function Occlusion alarm pressure is selectable Automaticlly recognize the syringe type - 10ml,20ml,30ml,50/60ml Possess temporarily clear up alarm function and recover set time alarm function Whenever speed rate more than 0.1ml/h,after the preset volume alarms, it turns to KVO speed rate automaticly. Display the accumulative infused volume Clear up the accumulative infused volume Internal battery embedded.