[ Amplifiers; ] [ Apparatus for transmission of communication; ] Baby monitors; [ Batteries, electric, for vehicles; Computer hardware; Electronic device for monitoring and optimizing photovoltaic arrays; Electronic monitors and monitor modules for monitoring electric current and electrical signals; Filters for radio interference suppression; Global positioning system (GPS); ] [ GPS navigation device; Horns for loudspeakers; ] [ Laser doppler for measuring purposes; Laser measuring systems; ]...