These entry level headsets are completely designed on reduction and function in all issues. Due to optimized ergonomics, the usual hinges for the adjustment of the ear cup are not necessary and let the headsets fit perfectly. Simplicity and functionality are visible in all details: flexible areas are thin, firm areas are reinforced; the angled microphone boom optimizes the position of the microphone tip; the asymmetrical, tilted connection to the earpiece is the outcome of long-time studies about ergonomics. The PC 31 and the monaural PC 21 are according to all expectations of a conservative, practical and nevertheless presentable product.