R & K tech ab is a provider of products and services such as telephone headsets,video systems, medical,background music systems,public address equipment,home theatre systems,microphones, capacitor/electrostatic,microphones, moving iron,microphones, cardioid response,microphones, pressure-gradient/velocity,microphones, stereophonic,microphones, radio, wireless,microphones, miniature,microphones, ruggedised,microphones, hazardous area, flameproof,microphones, hand-held,microphones, stand type,microphones, lapel,microphones, throat,microphones, aircraft,microphones, loudspeaker,microphone stands and accessories,microphone booms,crossovers for loudspeakers,loudspeakers, electrostatic,loudspeakers, moving coil,loudspeakers, moving iron,loudspeakers, piezoelectric (crystal),loudspeakers, exponential horn,loudspeakers, reversed horn,loudspeakers, horn,loudspeakers, multi-element,loudspeakers, re-entrant,loudspeakers, elliptical,loudspeakers, hazardous area, explosion proof,loudspeakers, weatherproof,loudspeakers, heat and humidity resistant,loudspeakers, miniature,loudspeakers, heavy duty, discotheque and stage use,loudspeakers, high power,loudspeakers, glass,loudspeakers, flat panel,loudspeakers, column type,loudspeakers, ceiling type,loudspeakers, pendant orbit,loudspeakers in cabinets,loudspeakers, high fidelity (hi-fi),loudspeakers, personal computer (pc),loudspeakers, personal computer (pc), wireless,loudspeakers for home theatre systems,loudspeaker kits, home assembly,loudspeakers, mobile communications, motor vehicle,acoustic boxes,megaphones,loudspeaker cones,tweeters,woofers,loudspeaker gaskets,loudspeaker voice coil formers,drivers (magnetodynamic units) for loudspeakers,loudspeaker diaphragms,loudspeakers, motor vehicle,headphones, moving coil,headphones, moving iron,headphones, double impedance,headphones, tropicalised,headphones, stereo,headphones, high fidelity (hi-fi),headphones, single earpiece,headphones, double earpiece,headphones, helmet type,headphones, cordless,monitors, personal (in-ear), for musicians,earphones, dictating machine,hearing aid systems, cinema and institutional,echo rooms, artificial,audio-visual (av) synchronising equipment,faders, electronic, recording studio,modulators for audio equipment,audio production control desks and mixing stands, professional, studio and portable,audio-video mixing systems,lacquer recording blanks, studio master discs,components for professional recording equipment,sound editing equipment,films and tapes for industrial recording,professional duplicators for audio cassettes,digital audio tape (dat) duplication equipment,duplicating, winding and packaging machines for audio cassette tapes,amplification systems, centralised,recorders, laser, audio,recorders, magnetic tape, industrial,voice communication recorders, multichannel,mixers and consoles, audio,voice processing systems, modular,sound synthesis appliances, audio reproduction,synthesizers, voice,music recording studio installations, complete,sound mixing and reproduction equipment for music group use,recording and playback equipment, recording studio,sound recording systems, centralised, remote,soundtrack recording and playback equipment, film,karaoke systems and equipment,cinema sound installations,simultaneous interpreting equipment,language laboratory equipment,audio-visual (av) systems, interactive,theatre or concert hall sound systems,passenger address systems for aircraft and trains,exhibition personal commentary equipment,music centres, deck, tuner-amplifier and tape player, combined.