'This ergonomic apparatus has been designed with safety and ease of operation in mind- making it ideal for use in education. A single control knob on the front panel incorporates the main switch with arbitrary scale of 0 to 10. A rapid heat switch allows higher temperatures to be obtained quickly. Sample tubes are illuminated from behind and magnified through a lens. A selector at the rear of the instrument allows a light or dark background. Ceramic insulation around the aluminium heating block minimises heat transfer to the casing. Thermometer- capillary tubes and cooling plug available as accessories. Supplied with instructions. Electrical supply: 230V AC 50/60Hz; Weight: 1.5kg; Temperature range: Ambient - 350''C.'