Calculators and calculating machines; Computer monitors; Electronic control circuits for ELECTRONIC MUSICAL INSTRUMENTS; Electronic control circuits for ELECTRIC HEATERS; Electronic control circuits for FANS; Electronic control gears (ECGs) for LED lamps and light fixtures; Lighting control apparatus; Loudspeakers, headphones, microphones and CD players; Portable audio players; Radio-frequency transmitters; Radio transmitters, receivers, and controllers for monitoring and controlling public l...