3,5 digit programmable universal instrument Model OM 352DC is an inexpensive 3,5-digit programmable panel DC voltmeter/ammeter. It is based on a single-chip microcontroller with RMS convertor, which guaranties high accuracy, stability and easy programming. It is possible to choose between 14mm and 20mm LED display. The 20 mm display is tri-colour and can change colours depending on pre-set values. Datasheet