Amplifiers; Antennas; Autotransformers; Amplifiers for wireless communications; Antennas for wireless communications apparatus; Apparatus and instruments for conveying, distributing, transforming, storing, regulating or controlling electric current; Apparatus for recording, transmission, processing and reproduction of sound, images or data; Audio-receivers and video-receivers; Audio equipment for vehicles, namely, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; Audio headphones; Bicycle helmets; Cases for music, audio and related electronic equipment, namely, cases for audio tuners, audio receivers, amplifiers, tape players, compact disc players, MP3 controllers/players, audio mixers, audio speakers in the nature of music studio monitors, microphones, audio speakers, compact discs, audio tapes, portable computers, antennas, phonographic record players, audio recording equipment, and the cables associated with all of the foregoing equipment; Circuit boards provided with integrated circuits; Circuit testers; Climate control systems consisting of digital thermostats for cooling equipment, and a programmable logic controller (PLC) with input and output features for temperature and humidity, which works with a remote digital read out controller