HSKK has three levels: elementary (~17 min), intermediate (~21 min), advanced (~24 min), all computer-recorded.
Elementary: repeat after listening, speak from pictures, Q&A - about 27 items; corresponds to HSK1-2.
Intermediate: answer after listening, speak from pictures, answer questions - about 14 items; HSK3-4.
Advanced: retell after listening, read aloud, speak from pictures, answer questions - about 10 items; HSK5-6.
Tips: speak in full sentences, control pace, keep your voice clear in recording, and for pictures cover who/what/when/where.
Results: register separately from the written test; graded pass/excellent; many schools and jobs require HSKK.