It is built using coroutines, allowing it to be completely asynchronous while remaining single threaded. It supports RFB protocols 3.3 through 3.8 and the VeNCrypt authentication extension providing SSL/TLS encryption with x509 certificate authentication.

The core library is written in C and a binding for Python using PyGTK is available. The networking layer supports connections over both IPv4 and IPv6.

This package contains the Python binding.