Devices and instruments for receiving, transmitting and reproducing audio signals, namely, audio transmitters and parts thereof, reception devices, namely, RF receivers; [ and RF input modules; ] instruments for receiving, transmitting and reproducing audio signals and acoustic information, namely, audio transmitters and audio receivers; apparatus for wireless transmission of acoustic information, namely, wireless microphone transmitters, plug-in microphone wireless transmitters; [ plug-in mi...

Advertising services; services of a product or service promoter, namely, sales promotion services for others and promoting the special events of others, namely, fairs, exhibitions or other sales events