Shenzhen Biocare's iP 21 Veterinary Single Channel Syringe Pump is flexible because you can use 10ml, 20 ml, or 50 ml syringes of any brand. It works on 3 different modes and has several alarm functions (i.e. low battery, syringe loose over). This pump, powered by a rechargable 11.1V 2,000mAh Li-Ion battery that can support 8 hours of continuous use, has volume limit range is 0.1 - 1,999.9ml, with an accuracy rate of ±2%, KVO rate of 1ml/h and 3 levels of occlusion pressure. The iP 21's rate range and bolus rate depends on the size of syringe you'll be using. Please visit Biocare's official website for more details.