Active Colette cables 

cable for insertion between the capsule and the amplifier of the Colette system 

contains active electronics for impedance conversion of the capsule 

3 mm thin, robust, tear-resistant cable 

a special sheath makes the cable torsion-proof, meaning that the hanging cable does not lose its orientation even when the ambient temperature rises. 

Signal transmission to the microphone amplifier is conducted asymmetrically, so the length should be less than 20m