Portable rechargeable batteries; audio interfaces; sound processing and modifying devices, namely, delay and reverb effect units for modifying sound; battery chargers; sound transmitting apparatus; wireless speakers; wires, electric; cabinets for loudspeakers; telecommunication equipment, namely, wireless headset; audio- and video-receivers; horns for loudspeakers; wah-wah pedals; headphones; microphones; digital sound processors; stereo receivers; electric and electronic effects units for mu...