Procurement of technical communication, hearing and warning aids:

22 18 24 Wireless microphones and installations (FM-systems),

22 18 27 IR-systems for transferring sound,

22 18 30 wire loop equipment,

22 18 33 Microphones,

22 21 06 Conversation amplifiers,

22 21 09 Conversation apparatuses,

22 39 03 Displays and monitors.