Audio transmitter units; wireless transmitters and receivers; Transmitters of electronic signals; Receivers of electronic signals; receivers for audio; [ sound amplifiers; Amplifiers for wireless communications; Pre-amplifiers; Guitar Amplifiers; Bass amplifiers; Musical instrument amplifiers; ] Electrical signal attenuators; Audio cables; Electrical cables for musical instruments; [ Microphones; ] Pouches made in whole or substantial part of leather specially adapted for personal electronic ...