The device analyzes the data and labels abnormalities on the device itself. A user with medical experience can view the onscreen tracing and interpret arrhythmias (irregularities in heart rhythm) on the fly. It was able to detect skipped beats and indicate whether the heart rhythm was too fast (tachycardia) or too slow (bradycardia). I changed the recording time through the software on a PC to 30 seconds (which is the maximum). The default recording is set to 10 seconds, which is too short to monitor for an arrhythmia. The device gives good quality tracings, particularly with lead I (held between the left and right palm). The software comes in a flash drive and a USB cable is provided to upload data to a Windows PC. It is small and can be transported easily in my purse. I purchased the Emay Portable Handheld Monitor after reading the various postings by customers and it is a really cool device.