Datrix Leadwires 5L for Holter Recorders (VX3 and DR512) are specifically for the VX3 and DR512 holter recorders. The VX3 is a lightweight, compact, digital Holter recorder designed for the recording of ECG data collected from ambulatory patients. A derivative of the Datrix DR512 digital Holter recorder, the VX3 has enhanced features, including an LCD to verify leadwire hookup and display recorder status and error messages, optional keypapad for selection of various options. Leadwire set only. Priced per set.