need the following requirement from recorder manufacturer for SDK integration
C# .NET SDK (32 bit & 64 bit - support .net frame work support).
Supply SDK with sample code.
Programming manual document.
List of SDK supported equipment.
Compatible device with model, manufacturer part no & Firmware list for the given SDK.
Support mail IDs, Skype IDs & immediate support contact information from manufacturer.
Need MINIMUM 21 WORKING DAYS for SDK integration
If SDK is not complicated depends on the sample code, Programming manual, Support from the manufacturer.