CN - 20 precision electronic almighty detergent products (dry) weight: 220 ml/product use: Cn - 20 are suitable for all kinds of precision electronic instrument, instrument repair and maintenance (a few general electrical equipment). For example, radio communications equipment, computer and TV, VCD/DVD, electronic circuit boards, audio equipment, etc., used for electrical equipment contact with body, switch, potentiometer, relay contact and automobile electronic ignition system cleaning, repair and maintenance, can also be for a variety of precision electronic products made before the factory quality assurance process..