Bullet_point: ['3750 Vrms photo-isolation protection. Four isolated banks when using four isolated external power supplies', 'Built-in DC/DC converter providing 3000 VDC isolation', 'Comes with free software with DOS Lib and TC/BC/MSC sample program (with source codes), DLL and OCX SDK for 32-bit and 64-bit Windows XP/2003/2008/7/8/10, VB/VC/Delphi/BCB/VB.NET/C#.NET/VC.NET/MATLAB sample programs with source codes', 'Selectable internal or external power for DI', 'Supports the +3.3 V/+ 5 V PCI bus. 64-channel optically isolated digital input'] (Page 1)